diff --git a/server/proto/vm.go b/server/proto/vm.go
index 3467e13..3408353 100644
--- a/server/proto/vm.go
+++ b/server/proto/vm.go
@@ -163,6 +163,17 @@ type InputRegion struct {
 	Height             int                  `json:"height"`
 	Resolutions        []OriginalResolution `json:"resolutions,omitempty"`
 	SelectedResolution string               `json:"selectedResolution"`
+	Regions            []ManualRegion       `json:"regions,omitempty"`
+	SelectedRegion     string               `json:"selectedRegion"`
+}
+
+type ManualRegion struct {
+	FrameWidth  int `json:"frameWidth"`
+	FrameHeight int `json:"frameHeight"`
+	Left        int `json:"left"`
+	Top         int `json:"top"`
+	Width       int `json:"width"`
+	Height      int `json:"height"`
 }
 
 type OriginalResolution struct {
@@ -180,6 +191,8 @@ type SetInputRegionReq struct {
 	Height             *int                  `json:"height,omitempty"`
 	Resolutions        *[]OriginalResolution `json:"resolutions,omitempty"`
 	SelectedResolution *string               `json:"selectedResolution,omitempty"`
+	Regions            *[]ManualRegion       `json:"regions,omitempty"`
+	SelectedRegion     *string               `json:"selectedRegion,omitempty"`
 }
 
 type GetInputRegionRsp struct {
diff --git a/server/service/vm/input_region.go b/server/service/vm/input_region.go
index aa87c3b..11d0470 100644
--- a/server/service/vm/input_region.go
+++ b/server/service/vm/input_region.go
@@ -99,7 +99,20 @@ func (s *Service) SetInputRegion(c *gin.Context) {
 		if req.SelectedResolution != nil {
 			region.SelectedResolution = *req.SelectedResolution
 		}
-		if err := validateSelectedResolution(region.SelectedResolution, region.Resolutions); err != nil {
+		if req.Regions != nil {
+			if err := validateManualRegions(*req.Regions); err != nil {
+				rsp.ErrRsp(c, -1, "invalid manual regions")
+				return
+			}
+			region.Regions = *req.Regions
+			if len(region.Regions) == 0 {
+				clearLegacyManualRegion(region)
+			}
+		}
+		if req.SelectedRegion != nil {
+			region.SelectedRegion = *req.SelectedRegion
+		}
+		if err := validateSelections(*region); err != nil {
 			rsp.ErrRsp(c, -1, "invalid selected resolution")
 			return
 		}
@@ -127,6 +140,8 @@ func (s *Service) SetInputRegion(c *gin.Context) {
 	if previous != nil {
 		region.Resolutions = previous.Resolutions
 		region.SelectedResolution = previous.SelectedResolution
+		region.Regions = previous.Regions
+		region.SelectedRegion = previous.SelectedRegion
 	}
 	if req.Resolutions != nil {
 		if err := validateOriginalResolutions(*req.Resolutions); err != nil {
@@ -138,7 +153,20 @@ func (s *Service) SetInputRegion(c *gin.Context) {
 	if req.SelectedResolution != nil {
 		region.SelectedResolution = *req.SelectedResolution
 	}
-	if err := validateSelectedResolution(region.SelectedResolution, region.Resolutions); err != nil {
+	if req.Regions != nil {
+		if err := validateManualRegions(*req.Regions); err != nil {
+			rsp.ErrRsp(c, -1, "invalid manual regions")
+			return
+		}
+		region.Regions = *req.Regions
+		if len(region.Regions) == 0 {
+			clearLegacyManualRegion(&region)
+		}
+	}
+	if req.SelectedRegion != nil {
+		region.SelectedRegion = *req.SelectedRegion
+	}
+	if err := validateSelections(region); err != nil {
 		rsp.ErrRsp(c, -1, "invalid selected resolution")
 		return
 	}
@@ -176,10 +204,68 @@ func validateSelectedResolution(selected string, resolutions []proto.OriginalRes
 	return errors.New("selected resolution not found")
 }
 
+func validateManualRegions(regions []proto.ManualRegion) error {
+	seen := make(map[string]struct{}, len(regions))
+	for _, region := range regions {
+		if err := validateManualRegion(region); err != nil {
+			return err
+		}
+		key := manualRegionKey(region)
+		if _, ok := seen[key]; ok {
+			return errors.New("duplicate manual region")
+		}
+		seen[key] = struct{}{}
+	}
+	return nil
+}
+
+func validateManualRegion(region proto.ManualRegion) error {
+	return validateInputRegion(proto.InputRegion{
+		Mode:        "manual",
+		FrameWidth:  region.FrameWidth,
+		FrameHeight: region.FrameHeight,
+		Left:        region.Left,
+		Top:         region.Top,
+		Width:       region.Width,
+		Height:      region.Height,
+	})
+}
+
+func validateSelections(region proto.InputRegion) error {
+	if region.SelectedResolution != "" && region.SelectedRegion != "" {
+		return errors.New("only one input region source may be selected")
+	}
+	if err := validateSelectedResolution(region.SelectedResolution, region.Resolutions); err != nil {
+		return err
+	}
+	if region.SelectedRegion == "" {
+		return nil
+	}
+	for _, item := range region.Regions {
+		if region.SelectedRegion == manualRegionKey(item) {
+			return nil
+		}
+	}
+	return errors.New("selected manual region not found")
+}
+
 func resolutionKey(resolution proto.OriginalResolution) string {
 	return fmt.Sprintf("%dx%d", resolution.Width, resolution.Height)
 }
 
+func manualRegionKey(region proto.ManualRegion) string {
+	return fmt.Sprintf("%dx%d", region.Width, region.Height)
+}
+
+func clearLegacyManualRegion(region *proto.InputRegion) {
+	region.FrameWidth = 0
+	region.FrameHeight = 0
+	region.Left = 0
+	region.Top = 0
+	region.Width = 0
+	region.Height = 0
+}
+
 func inputRegionFromRequest(req proto.SetInputRegionReq) (proto.InputRegion, error) {
 	if req.FrameWidth == nil || req.FrameHeight == nil || req.Left == nil ||
 		req.Top == nil || req.Width == nil || req.Height == nil {
@@ -236,9 +322,29 @@ func readInputRegion(path string) (*proto.InputRegion, error) {
 	if region.Mode == "" {
 		region.Mode = "manual"
 	}
+	if len(region.Regions) == 0 && region.FrameWidth > 0 && region.FrameHeight > 0 {
+		manual := proto.ManualRegion{
+			FrameWidth:  region.FrameWidth,
+			FrameHeight: region.FrameHeight,
+			Left:        region.Left,
+			Top:         region.Top,
+			Width:       region.Width,
+			Height:      region.Height,
+		}
+		region.Regions = []proto.ManualRegion{manual}
+		if region.SelectedResolution == "" {
+			region.SelectedRegion = manualRegionKey(manual)
+		}
+	}
 	if err := validateInputRegion(*region); err != nil {
 		return nil, nil
 	}
+	if err := validateManualRegions(region.Regions); err != nil {
+		return nil, nil
+	}
+	if err := validateSelections(*region); err != nil {
+		return nil, nil
+	}
 	return region, nil
 }
 
diff --git a/web/src/api/vm.ts b/web/src/api/vm.ts
index 47af831..a11fbaa 100644
--- a/web/src/api/vm.ts
+++ b/web/src/api/vm.ts
@@ -48,11 +48,17 @@ export function setInputRegion(region: InputRegion) {
   return http.post('/api/vm/input-region', { mode: 'manual', ...region });
 }
 
-export function setInputRegionConfig(region: InputRegion, selectedResolution: string) {
+export function setInputRegionConfig(
+  region: InputRegion,
+  regions: InputRegion[],
+  selectedRegion: string
+) {
   return http.post('/api/vm/input-region', {
     mode: 'manual',
     ...region,
-    selectedResolution
+    regions,
+    selectedRegion,
+    selectedResolution: ''
   });
 }
 
@@ -66,17 +72,36 @@ export function setOriginalResolutions(mode: ControlRegionMode, resolutions: Ori
 
 export function setOriginalResolutionConfig(
   resolutions: OriginalResolution[],
-  selectedResolution: string
+  selectedResolution: string,
+  selectedRegion: string
 ) {
   return http.post('/api/vm/input-region', {
     mode: 'manual',
     resolutions,
-    selectedResolution
+    selectedResolution,
+    selectedRegion
   });
 }
 
 export function setSelectedOriginalResolution(selectedResolution: string) {
-  return http.post('/api/vm/input-region', { mode: 'manual', selectedResolution });
+  return http.post('/api/vm/input-region', {
+    mode: 'manual',
+    selectedResolution,
+    selectedRegion: ''
+  });
+}
+
+export function setManualRegions(
+  regions: InputRegion[],
+  selectedRegion: string,
+  selectedResolution = ''
+) {
+  return http.post('/api/vm/input-region', {
+    mode: 'manual',
+    regions,
+    selectedRegion,
+    selectedResolution
+  });
 }
 
 // get memory limit
diff --git a/web/src/i18n/locales/ca.ts b/web/src/i18n/locales/ca.ts
index 30f2e04..b1cf41c 100644
--- a/web/src/i18n/locales/ca.ts
+++ b/web/src/i18n/locales/ca.ts
@@ -73,9 +73,10 @@ const ca = {
         autoWarning:
           "El calibratge pot fallar quan l'aplicació de l'usuari tingui un fons completament negre.",
         manual: 'Manual',
+        selectedResolution: "Resolució de l'àrea seleccionada",
+        unused: 'No utilitzada',
         originalResolution: 'Resolució original',
         selectResolution: 'Selecciona la resolució original',
-        useSelectedArea: "Utilitza la resolució de l'àrea seleccionada",
         addResolution: 'Afegeix una resolució personalitzada',
         add: 'Afegeix',
         duplicateResolution: 'Aquesta resolució ja existeix.',
diff --git a/web/src/i18n/locales/cz.ts b/web/src/i18n/locales/cz.ts
index 7d35fdf..d571e79 100644
--- a/web/src/i18n/locales/cz.ts
+++ b/web/src/i18n/locales/cz.ts
@@ -73,9 +73,10 @@ const cz = {
         auto: 'Automaticky',
         autoWarning: 'Kalibrace může selhat, pokud má uživatelská aplikace zcela černé pozadí.',
         manual: 'Ručně',
+        selectedResolution: 'Rozlišení vybrané oblasti',
+        unused: 'Nepoužito',
         originalResolution: 'Původní rozlišení',
         selectResolution: 'Vyberte původní rozlišení',
-        useSelectedArea: 'Použít rozlišení vybrané oblasti',
         addResolution: 'Přidat vlastní rozlišení',
         add: 'Přidat',
         duplicateResolution: 'Toto rozlišení již existuje.',
diff --git a/web/src/i18n/locales/da.ts b/web/src/i18n/locales/da.ts
index 614c7d8..9eabeda 100644
--- a/web/src/i18n/locales/da.ts
+++ b/web/src/i18n/locales/da.ts
@@ -73,9 +73,10 @@ const da = {
         autoWarning:
           'Kalibreringen kan mislykkes, hvis brugerprogrammet har en helt sort baggrund.',
         manual: 'Manuel',
+        selectedResolution: 'Valgt områdeopløsning',
+        unused: 'Ikke i brug',
         originalResolution: 'Oprindelig opløsning',
         selectResolution: 'Vælg oprindelig opløsning',
-        useSelectedArea: 'Brug det valgte områdes opløsning',
         addResolution: 'Tilføj brugerdefineret opløsning',
         add: 'Tilføj',
         duplicateResolution: 'Denne opløsning findes allerede.',
diff --git a/web/src/i18n/locales/de.ts b/web/src/i18n/locales/de.ts
index 181764c..2df4ce4 100644
--- a/web/src/i18n/locales/de.ts
+++ b/web/src/i18n/locales/de.ts
@@ -76,9 +76,10 @@ const de = {
         autoWarning:
           'Die Kalibrierung kann fehlschlagen, wenn die Benutzeranwendung einen vollständig schwarzen Hintergrund hat.',
         manual: 'Manuell',
+        selectedResolution: 'Auflösung des ausgewählten Bereichs',
+        unused: 'Nicht verwendet',
         originalResolution: 'Originalauflösung',
         selectResolution: 'Originalauflösung auswählen',
-        useSelectedArea: 'Auflösung des ausgewählten Bereichs verwenden',
         addResolution: 'Benutzerdefinierte Auflösung hinzufügen',
         add: 'Hinzufügen',
         duplicateResolution: 'Diese Auflösung ist bereits vorhanden.',
diff --git a/web/src/i18n/locales/en.ts b/web/src/i18n/locales/en.ts
index b4bbe9b..1e2e676 100644
--- a/web/src/i18n/locales/en.ts
+++ b/web/src/i18n/locales/en.ts
@@ -74,9 +74,10 @@ const en = {
         auto: 'Auto',
         autoWarning: 'Calibration may fail when the user application has a pure black background.',
         manual: 'Manual',
+        selectedResolution: 'Selected Area Resolution',
+        unused: 'Not used',
         originalResolution: 'Original Resolution',
         selectResolution: 'Select original resolution',
-        useSelectedArea: 'Use selected area resolution',
         addResolution: 'Add custom resolution',
         add: 'Add',
         duplicateResolution: 'This resolution already exists.',
diff --git a/web/src/i18n/locales/es.ts b/web/src/i18n/locales/es.ts
index 928aca4..76d25c1 100644
--- a/web/src/i18n/locales/es.ts
+++ b/web/src/i18n/locales/es.ts
@@ -74,9 +74,10 @@ const es = {
         autoWarning:
           'La calibración puede fallar si la aplicación del usuario tiene un fondo completamente negro.',
         manual: 'Manual',
+        selectedResolution: 'Resolución del área seleccionada',
+        unused: 'Sin usar',
         originalResolution: 'Resolución original',
         selectResolution: 'Seleccionar resolución original',
-        useSelectedArea: 'Usar la resolución del área seleccionada',
         addResolution: 'Añadir resolución personalizada',
         add: 'Añadir',
         duplicateResolution: 'Esta resolución ya existe.',
diff --git a/web/src/i18n/locales/fr.ts b/web/src/i18n/locales/fr.ts
index a28aa11..699985a 100644
--- a/web/src/i18n/locales/fr.ts
+++ b/web/src/i18n/locales/fr.ts
@@ -76,9 +76,10 @@ const fr = {
         autoWarning:
           "L'étalonnage peut échouer si l'application utilisateur présente un arrière-plan entièrement noir.",
         manual: 'Manuel',
+        selectedResolution: 'Résolution de la zone sélectionnée',
+        unused: 'Non utilisée',
         originalResolution: "Résolution d'origine",
         selectResolution: "Sélectionner la résolution d'origine",
-        useSelectedArea: 'Utiliser la résolution de la zone sélectionnée',
         addResolution: 'Ajouter une résolution personnalisée',
         add: 'Ajouter',
         duplicateResolution: 'Cette résolution existe déjà.',
diff --git a/web/src/i18n/locales/hu.ts b/web/src/i18n/locales/hu.ts
index a6a2a0d..904f29b 100644
--- a/web/src/i18n/locales/hu.ts
+++ b/web/src/i18n/locales/hu.ts
@@ -75,9 +75,10 @@ const hu = {
         autoWarning:
           'A kalibrálás sikertelen lehet, ha a felhasználói alkalmazás háttere teljesen fekete.',
         manual: 'Kézi',
+        selectedResolution: 'Kijelölt terület felbontása',
+        unused: 'Nincs használatban',
         originalResolution: 'Eredeti felbontás',
         selectResolution: 'Válassza ki az eredeti felbontást',
-        useSelectedArea: 'A kijelölt terület felbontásának használata',
         addResolution: 'Egyéni felbontás hozzáadása',
         add: 'Hozzáadás',
         duplicateResolution: 'Ez a felbontás már létezik.',
diff --git a/web/src/i18n/locales/id.ts b/web/src/i18n/locales/id.ts
index 9a484af..9bbb89e 100644
--- a/web/src/i18n/locales/id.ts
+++ b/web/src/i18n/locales/id.ts
@@ -73,9 +73,10 @@ const id = {
         autoWarning:
           'Kalibrasi mungkin gagal jika aplikasi pengguna menggunakan latar belakang hitam pekat.',
         manual: 'Manual',
+        selectedResolution: 'Resolusi Area Terpilih',
+        unused: 'Tidak digunakan',
         originalResolution: 'Resolusi Asli',
         selectResolution: 'Pilih resolusi asli',
-        useSelectedArea: 'Gunakan resolusi area yang dipilih',
         addResolution: 'Tambahkan resolusi khusus',
         add: 'Tambah',
         duplicateResolution: 'Resolusi ini sudah ada.',
diff --git a/web/src/i18n/locales/it.ts b/web/src/i18n/locales/it.ts
index 1e419ad..1dd9c6c 100644
--- a/web/src/i18n/locales/it.ts
+++ b/web/src/i18n/locales/it.ts
@@ -75,9 +75,10 @@ const it = {
         autoWarning:
           "La calibrazione potrebbe non riuscire se l'applicazione utente ha uno sfondo completamente nero.",
         manual: 'Manuale',
+        selectedResolution: 'Risoluzione area selezionata',
+        unused: 'Non utilizzata',
         originalResolution: 'Risoluzione originale',
         selectResolution: 'Seleziona la risoluzione originale',
-        useSelectedArea: "Usa la risoluzione dell'area selezionata",
         addResolution: 'Aggiungi una risoluzione personalizzata',
         add: 'Aggiungi',
         duplicateResolution: 'Questa risoluzione esiste già.',
diff --git a/web/src/i18n/locales/ja.ts b/web/src/i18n/locales/ja.ts
index c305acd..290a119 100644
--- a/web/src/i18n/locales/ja.ts
+++ b/web/src/i18n/locales/ja.ts
@@ -73,9 +73,10 @@ const ja = {
         autoWarning:
           'ユーザーアプリケーションの背景が完全な黒の場合、補正に失敗することがあります。',
         manual: '手動',
+        selectedResolution: '選択領域の解像度',
+        unused: '未使用',
         originalResolution: '元の解像度',
         selectResolution: '元の解像度を選択',
-        useSelectedArea: '選択領域の解像度を使用',
         addResolution: 'カスタム解像度を追加',
         add: '追加',
         duplicateResolution: 'この解像度はすでに存在します。',
diff --git a/web/src/i18n/locales/ko.ts b/web/src/i18n/locales/ko.ts
index e1b2d61..5d24176 100644
--- a/web/src/i18n/locales/ko.ts
+++ b/web/src/i18n/locales/ko.ts
@@ -71,9 +71,10 @@ const ko = {
         auto: '자동',
         autoWarning: '사용자 애플리케이션의 배경이 완전히 검은색이면 보정에 실패할 수 있습니다.',
         manual: '수동',
+        selectedResolution: '선택 영역 해상도',
+        unused: '사용 안 함',
         originalResolution: '원본 해상도',
         selectResolution: '원본 해상도 선택',
-        useSelectedArea: '선택한 영역의 해상도 사용',
         addResolution: '사용자 지정 해상도 추가',
         add: '추가',
         duplicateResolution: '이미 존재하는 해상도입니다.',
diff --git a/web/src/i18n/locales/nb.ts b/web/src/i18n/locales/nb.ts
index cad7c37..3fcf9b6 100644
--- a/web/src/i18n/locales/nb.ts
+++ b/web/src/i18n/locales/nb.ts
@@ -74,9 +74,10 @@ const nb = {
         autoWarning:
           'Kalibreringen kan mislykkes hvis brukerprogrammet har en helt svart bakgrunn.',
         manual: 'Manuell',
+        selectedResolution: 'Oppløsning for valgt område',
+        unused: 'Ikke i bruk',
         originalResolution: 'Opprinnelig oppløsning',
         selectResolution: 'Velg opprinnelig oppløsning',
-        useSelectedArea: 'Bruk oppløsningen til det valgte området',
         addResolution: 'Legg til egendefinert oppløsning',
         add: 'Legg til',
         duplicateResolution: 'Denne oppløsningen finnes allerede.',
diff --git a/web/src/i18n/locales/nl.ts b/web/src/i18n/locales/nl.ts
index 37e22d6..1e7c6d5 100644
--- a/web/src/i18n/locales/nl.ts
+++ b/web/src/i18n/locales/nl.ts
@@ -75,9 +75,10 @@ const nl = {
         autoWarning:
           'De kalibratie kan mislukken als de gebruikerstoepassing een volledig zwarte achtergrond heeft.',
         manual: 'Handmatig',
+        selectedResolution: 'Resolutie van geselecteerd gebied',
+        unused: 'Niet gebruikt',
         originalResolution: 'Oorspronkelijke resolutie',
         selectResolution: 'Oorspronkelijke resolutie selecteren',
-        useSelectedArea: 'Resolutie van geselecteerd gebied gebruiken',
         addResolution: 'Aangepaste resolutie toevoegen',
         add: 'Toevoegen',
         duplicateResolution: 'Deze resolutie bestaat al.',
diff --git a/web/src/i18n/locales/pl.ts b/web/src/i18n/locales/pl.ts
index 514e07e..8613e41 100644
--- a/web/src/i18n/locales/pl.ts
+++ b/web/src/i18n/locales/pl.ts
@@ -74,9 +74,10 @@ const pl = {
         autoWarning:
           'Kalibracja może się nie powieść, gdy aplikacja użytkownika ma całkowicie czarne tło.',
         manual: 'Ręczna',
+        selectedResolution: 'Rozdzielczość zaznaczonego obszaru',
+        unused: 'Nieużywane',
         originalResolution: 'Oryginalna rozdzielczość',
         selectResolution: 'Wybierz oryginalną rozdzielczość',
-        useSelectedArea: 'Użyj rozdzielczości zaznaczonego obszaru',
         addResolution: 'Dodaj niestandardową rozdzielczość',
         add: 'Dodaj',
         duplicateResolution: 'Ta rozdzielczość już istnieje.',
diff --git a/web/src/i18n/locales/pt_br.ts b/web/src/i18n/locales/pt_br.ts
index a99433f..8309dca 100644
--- a/web/src/i18n/locales/pt_br.ts
+++ b/web/src/i18n/locales/pt_br.ts
@@ -73,9 +73,10 @@ const pt_br = {
         autoWarning:
           'A calibração pode falhar se o aplicativo do usuário tiver um fundo totalmente preto.',
         manual: 'Manual',
+        selectedResolution: 'Resolução da área selecionada',
+        unused: 'Não utilizado',
         originalResolution: 'Resolução original',
         selectResolution: 'Selecionar resolução original',
-        useSelectedArea: 'Usar a resolução da área selecionada',
         addResolution: 'Adicionar resolução personalizada',
         add: 'Adicionar',
         duplicateResolution: 'Esta resolução já existe.',
diff --git a/web/src/i18n/locales/ru.ts b/web/src/i18n/locales/ru.ts
index 2fdb7b2..ab15241 100644
--- a/web/src/i18n/locales/ru.ts
+++ b/web/src/i18n/locales/ru.ts
@@ -73,9 +73,10 @@ const ru = {
         autoWarning:
           'Калибровка может завершиться неудачей, если фон пользовательского приложения полностью чёрный.',
         manual: 'Вручную',
+        selectedResolution: 'Разрешение выбранной области',
+        unused: 'Не используется',
         originalResolution: 'Исходное разрешение',
         selectResolution: 'Выберите исходное разрешение',
-        useSelectedArea: 'Использовать разрешение выбранной области',
         addResolution: 'Добавить пользовательское разрешение',
         add: 'Добавить',
         duplicateResolution: 'Такое разрешение уже существует.',
diff --git a/web/src/i18n/locales/se.ts b/web/src/i18n/locales/se.ts
index 2e07934..968dd45 100644
--- a/web/src/i18n/locales/se.ts
+++ b/web/src/i18n/locales/se.ts
@@ -70,9 +70,10 @@ const se = {
         auto: 'Automatisk',
         autoWarning: 'Kalibreringen kan misslyckas om användarprogrammet har en helsvart bakgrund.',
         manual: 'Manuell',
+        selectedResolution: 'Valt områdesupplösning',
+        unused: 'Används inte',
         originalResolution: 'Ursprunglig upplösning',
         selectResolution: 'Välj ursprunglig upplösning',
-        useSelectedArea: 'Använd upplösningen för det valda området',
         addResolution: 'Lägg till anpassad upplösning',
         add: 'Lägg till',
         duplicateResolution: 'Den här upplösningen finns redan.',
diff --git a/web/src/i18n/locales/th.ts b/web/src/i18n/locales/th.ts
index 929f2a9..f4d2f8f 100644
--- a/web/src/i18n/locales/th.ts
+++ b/web/src/i18n/locales/th.ts
@@ -70,9 +70,10 @@ const th = {
         auto: 'อัตโนมัติ',
         autoWarning: 'การปรับเทียบอาจล้มเหลวเมื่อแอปพลิเคชันของผู้ใช้มีพื้นหลังสีดำสนิท',
         manual: 'กำหนดเอง',
+        selectedResolution: 'ความละเอียดพื้นที่ที่เลือก',
+        unused: 'ไม่ได้ใช้',
         originalResolution: 'ความละเอียดต้นฉบับ',
         selectResolution: 'เลือกความละเอียดต้นฉบับ',
-        useSelectedArea: 'ใช้ความละเอียดของพื้นที่ที่เลือก',
         addResolution: 'เพิ่มความละเอียดแบบกำหนดเอง',
         add: 'เพิ่ม',
         duplicateResolution: 'มีความละเอียดนี้อยู่แล้ว',
diff --git a/web/src/i18n/locales/tr.ts b/web/src/i18n/locales/tr.ts
index 80abb96..9e6361c 100644
--- a/web/src/i18n/locales/tr.ts
+++ b/web/src/i18n/locales/tr.ts
@@ -74,9 +74,10 @@ const tr = {
         autoWarning:
           'Kullanıcı uygulamasının arka planı tamamen siyah olduğunda kalibrasyon başarısız olabilir.',
         manual: 'Manuel',
+        selectedResolution: 'Seçili Alan Çözünürlüğü',
+        unused: 'Kullanılmıyor',
         originalResolution: 'Orijinal Çözünürlük',
         selectResolution: 'Orijinal çözünürlüğü seçin',
-        useSelectedArea: 'Seçili alanın çözünürlüğünü kullan',
         addResolution: 'Özel çözünürlük ekle',
         add: 'Ekle',
         duplicateResolution: 'Bu çözünürlük zaten mevcut.',
diff --git a/web/src/i18n/locales/uk.ts b/web/src/i18n/locales/uk.ts
index 10e3706..c5b76d5 100644
--- a/web/src/i18n/locales/uk.ts
+++ b/web/src/i18n/locales/uk.ts
@@ -74,9 +74,10 @@ const uk = {
         autoWarning:
           'Калібрування може завершитися невдало, якщо користувацька програма має повністю чорне тло.',
         manual: 'Вручну',
+        selectedResolution: 'Роздільна здатність вибраної області',
+        unused: 'Не використовується',
         originalResolution: 'Початкова роздільна здатність',
         selectResolution: 'Виберіть початкову роздільну здатність',
-        useSelectedArea: 'Використати роздільну здатність вибраної області',
         addResolution: 'Додати власну роздільну здатність',
         add: 'Додати',
         duplicateResolution: 'Така роздільна здатність уже існує.',
diff --git a/web/src/i18n/locales/vi.ts b/web/src/i18n/locales/vi.ts
index 0ca2f1d..223554e 100644
--- a/web/src/i18n/locales/vi.ts
+++ b/web/src/i18n/locales/vi.ts
@@ -73,9 +73,10 @@ const vi = {
         autoWarning:
           'Hiệu chỉnh có thể thất bại khi ứng dụng của người dùng có nền hoàn toàn màu đen.',
         manual: 'Thủ công',
+        selectedResolution: 'Độ phân giải vùng đã chọn',
+        unused: 'Không sử dụng',
         originalResolution: 'Độ phân giải gốc',
         selectResolution: 'Chọn độ phân giải gốc',
-        useSelectedArea: 'Sử dụng độ phân giải của vùng đã chọn',
         addResolution: 'Thêm độ phân giải tùy chỉnh',
         add: 'Thêm',
         duplicateResolution: 'Độ phân giải này đã tồn tại.',
diff --git a/web/src/i18n/locales/zh.ts b/web/src/i18n/locales/zh.ts
index 7cce56a..4feecf9 100644
--- a/web/src/i18n/locales/zh.ts
+++ b/web/src/i18n/locales/zh.ts
@@ -72,9 +72,10 @@ const zh = {
         auto: '自动',
         autoWarning: '若用户程序为纯黑色背景，则可能校准出错。',
         manual: '手动',
+        selectedResolution: '框选分辨率',
+        unused: '未使用',
         originalResolution: '原始分辨率',
         selectResolution: '选择原始分辨率',
-        useSelectedArea: '使用框选分辨率',
         addResolution: '添加自定义分辨率',
         add: '添加',
         duplicateResolution: '该分辨率已存在。',
diff --git a/web/src/i18n/locales/zh_tw.ts b/web/src/i18n/locales/zh_tw.ts
index 8176c8f..d120728 100644
--- a/web/src/i18n/locales/zh_tw.ts
+++ b/web/src/i18n/locales/zh_tw.ts
@@ -69,9 +69,10 @@ const zh_tw = {
         auto: '自動',
         autoWarning: '當使用者應用程式使用全黑背景時，校正可能會失敗。',
         manual: '手動',
+        selectedResolution: '框選解析度',
+        unused: '未使用',
         originalResolution: '原始解析度',
         selectResolution: '選擇原始解析度',
-        useSelectedArea: '使用所選區域的解析度',
         addResolution: '新增自訂解析度',
         add: '新增',
         duplicateResolution: '此解析度已存在。',
diff --git a/web/src/jotai/screen.ts b/web/src/jotai/screen.ts
index d5b26ba..0cbf525 100644
--- a/web/src/jotai/screen.ts
+++ b/web/src/jotai/screen.ts
@@ -18,6 +18,8 @@ export const resolutionAtom = atom<Resolution | null>(null);
 // currently effective absolute mouse input region
 export const inputRegionAtom = atom<InputRegion | null>(null);
 export const manualInputRegionAtom = atom<InputRegion | null>(null);
+export const manualRegionsAtom = atom<InputRegion[]>([]);
+export const selectedManualRegionAtom = atom<string>('');
 export const selectedOriginalResolutionAtom = atom<string>('');
 
 // device-level control region mode; disabled by default
diff --git a/web/src/pages/desktop/index.tsx b/web/src/pages/desktop/index.tsx
index a533a52..bcb1b07 100644
--- a/web/src/pages/desktop/index.tsx
+++ b/web/src/pages/desktop/index.tsx
@@ -13,7 +13,9 @@ import {
   controlRegionModeAtom,
   inputRegionAtom,
   manualInputRegionAtom,
+  manualRegionsAtom,
   resolutionAtom,
+  selectedManualRegionAtom,
   selectedOriginalResolutionAtom,
   videoModeAtom
 } from '@/jotai/screen.ts';
@@ -42,14 +44,11 @@ function getVideoMode() {
   const defaultVideoMode = window.RTCPeerConnection ? 'h264' : 'mjpeg';
 
   const cookieVideoMode = storage.getVideoMode();
-  if (cookieVideoMode) {
-    if (cookieVideoMode === 'direct' && !window.VideoDecoder) {
-      return defaultVideoMode;
-    }
-    return cookieVideoMode;
+  if (!cookieVideoMode || (cookieVideoMode === 'direct' && !window.VideoDecoder)) {
+    return defaultVideoMode;
   }
 
-  return defaultVideoMode;
+  return ['direct', 'h264', 'mjpeg'].includes(cookieVideoMode) ? cookieVideoMode : defaultVideoMode;
 }
 
 export const Desktop = () => {
@@ -64,6 +63,8 @@ export const Desktop = () => {
   const [inputRegion, setInputRegion] = useAtom(inputRegionAtom);
   const [controlRegionMode, setControlRegionModeState] = useAtom(controlRegionModeAtom);
   const setManualInputRegion = useSetAtom(manualInputRegionAtom);
+  const setManualRegions = useSetAtom(manualRegionsAtom);
+  const setSelectedManualRegion = useSetAtom(selectedManualRegionAtom);
   const setSelectedOriginalResolution = useSetAtom(selectedOriginalResolutionAtom);
   const isPicoclawChatOpen = useAtomValue(picoclawChatOpenAtom);
 
@@ -76,6 +77,8 @@ export const Desktop = () => {
     setResolution(res);
     setInputRegion(null);
     setManualInputRegion(null);
+    setManualRegions([]);
+    setSelectedManualRegion('');
     setSelectedOriginalResolution('');
     setControlRegionModeState('off');
 
@@ -87,15 +90,24 @@ export const Desktop = () => {
           ? (config as InputRegion)
           : null;
         const selectedResolution = config?.selectedResolution || '';
+        const regions = config?.regions || [];
+        const selectedRegion = config?.selectedRegion || '';
+        const selectedManualRegion = regions.find(
+          (region) => `${region.width}x${region.height}` === selectedRegion
+        );
         setManualInputRegion(manualRegion);
+        setManualRegions(regions);
+        setSelectedManualRegion(selectedRegion);
         setSelectedOriginalResolution(selectedResolution);
-        setInputRegion(mode === 'manual' && !selectedResolution ? manualRegion : null);
+        setInputRegion(mode === 'manual' && selectedRegion ? selectedManualRegion || null : null);
         setControlRegionModeState(mode);
       })
       .catch(() => {
         setControlRegionModeState('off');
         setInputRegion(null);
         setManualInputRegion(null);
+        setManualRegions([]);
+        setSelectedManualRegion('');
         setSelectedOriginalResolution('');
       });
 
@@ -107,7 +119,9 @@ export const Desktop = () => {
     setControlRegionModeState,
     setInputRegion,
     setManualInputRegion,
+    setManualRegions,
     setResolution,
+    setSelectedManualRegion,
     setSelectedOriginalResolution,
     setVideoMode
   ]);
@@ -135,7 +149,7 @@ export const Desktop = () => {
         clearTimeout(validationTimer);
       }
       validationTimer = setTimeout(() => {
-        const mediaSize = getMediaSize(target);
+        const mediaSize = getMediaSize(target, resolution);
         if (!mediaSize || !isMediaReady(target) || isInputRegionCompatible(region, mediaSize)) {
           return;
         }
diff --git a/web/src/pages/desktop/menu/screen/constants.ts b/web/src/pages/desktop/menu/screen/constants.ts
index 64d45e7..9fac0cf 100644
--- a/web/src/pages/desktop/menu/screen/constants.ts
+++ b/web/src/pages/desktop/menu/screen/constants.ts
@@ -11,3 +11,23 @@ export const BitRateMap = new Map([
   [3, 2000],
   [4, 1000]
 ]);
+
+export function getQualityMap(videoMode: string) {
+  if (videoMode === 'mjpeg') {
+    return QualityMap;
+  }
+  if (videoMode === 'direct' || videoMode === 'h264') {
+    return BitRateMap;
+  }
+  return null;
+}
+
+export function getScreenType(videoMode: string) {
+  if (videoMode === 'mjpeg') {
+    return 0;
+  }
+  if (videoMode === 'direct' || videoMode === 'h264') {
+    return 1;
+  }
+  return null;
+}
diff --git a/web/src/pages/desktop/menu/screen/index.tsx b/web/src/pages/desktop/menu/screen/index.tsx
index f8b2fbb..c910706 100644
--- a/web/src/pages/desktop/menu/screen/index.tsx
+++ b/web/src/pages/desktop/menu/screen/index.tsx
@@ -8,7 +8,7 @@ import * as ls from '@/lib/localstorage';
 import { resolutionAtom, videoModeAtom } from '@/jotai/screen.ts';
 import { MenuItem } from '@/components/menu-item.tsx';
 
-import { BitRateMap, QualityMap } from './constants.ts';
+import { getQualityMap, getScreenType } from './constants.ts';
 import { Fps } from './fps';
 import { FrameDetect } from './frame-detect';
 import { Gop } from './gop.tsx';
@@ -23,12 +23,16 @@ export const Screen = () => {
 
   const videoMode = useAtomValue(videoModeAtom);
   const resolution = useAtomValue(resolutionAtom);
+  const isMjpeg = videoMode === 'mjpeg';
   const [fps, setFps] = useState(30);
   const [quality, setQuality] = useState(2);
   const [gop, setGop] = useState(30);
 
   useEffect(() => {
-    updateScreen('type', videoMode === 'mjpeg' ? 0 : 1);
+    const screenType = getScreenType(videoMode);
+    if (screenType !== null) {
+      updateScreen('type', screenType);
+    }
     updateScreen('resolution', resolution!.height);
     updateQuality();
     updateFps();
@@ -40,7 +44,9 @@ export const Screen = () => {
     if (!cookieQuality) return;
 
     const key = cookieQuality >= 1 && cookieQuality <= 4 ? cookieQuality : 2;
-    const value = videoMode === 'mjpeg' ? QualityMap.get(key)! : BitRateMap.get(key)!;
+    const qualityMap = getQualityMap(videoMode);
+    const value = qualityMap?.get(key);
+    if (value === undefined) return;
 
     const rsp = await updateScreen('quality', value);
     if (rsp.code === 0) {
@@ -75,8 +81,8 @@ export const Screen = () => {
       <Quality quality={quality} setQuality={setQuality} />
       <Fps fps={fps} setFps={setFps} />
       <Scale />
-      {videoMode !== 'mjpeg' && <Gop gop={gop} setGop={setGop} />}
-      {videoMode === 'mjpeg' && <FrameDetect />}
+      {!isMjpeg && <Gop gop={gop} setGop={setGop} />}
+      {isMjpeg && <FrameDetect />}
       <Reset />
     </div>
   );
diff --git a/web/src/pages/desktop/menu/screen/original-resolution.tsx b/web/src/pages/desktop/menu/screen/original-resolution.tsx
index bcad02b..fa88818 100644
--- a/web/src/pages/desktop/menu/screen/original-resolution.tsx
+++ b/web/src/pages/desktop/menu/screen/original-resolution.tsx
@@ -12,12 +12,13 @@ import {
   Tooltip,
   Typography
 } from 'antd';
-import { useAtom, useAtomValue, useSetAtom } from 'jotai';
+import { useAtom, useSetAtom } from 'jotai';
 import { ScanSearchIcon } from 'lucide-react';
 import { useTranslation } from 'react-i18next';
 
 import {
   getInputRegion,
+  setManualRegions as saveManualRegions,
   setControlRegionMode,
   setOriginalResolutionConfig,
   setSelectedOriginalResolution
@@ -34,6 +35,8 @@ import {
   inputRegionAtom,
   inputRegionSelectingAtom,
   manualInputRegionAtom,
+  manualRegionsAtom,
+  selectedManualRegionAtom,
   selectedOriginalResolutionAtom
 } from '@/jotai/screen.ts';
 import { menuCloseSignalAtom } from '@/jotai/settings.ts';
@@ -44,9 +47,12 @@ const resolutionKey = ({ width, height }: ResolutionPreset) => `${width}x${heigh
 export const OriginalResolution = () => {
   const { t } = useTranslation();
   const setInputRegion = useSetAtom(inputRegionAtom);
-  const manualInputRegion = useAtomValue(manualInputRegionAtom);
   const setManualInputRegion = useSetAtom(manualInputRegionAtom);
-  const [selectedResolution, setSelectedResolution] = useAtom(selectedOriginalResolutionAtom);
+  const [manualRegions, setManualRegions] = useAtom(manualRegionsAtom);
+  const [selectedManualRegion, setSelectedManualRegion] = useAtom(selectedManualRegionAtom);
+  const [selectedOriginalResolution, setSelectedOriginalResolutionState] = useAtom(
+    selectedOriginalResolutionAtom
+  );
   const [mode, setMode] = useAtom(controlRegionModeAtom);
   const setSelecting = useSetAtom(inputRegionSelectingAtom);
   const setKeyboardLock = useSetAtom(keyboardLockAtom);
@@ -74,7 +80,9 @@ export const OriginalResolution = () => {
     if (rsp.code === 0) {
       const config = rsp.data as ControlRegionConfig;
       setResolutions(config?.resolutions || []);
-      setSelectedResolution(config?.selectedResolution || '');
+      setManualRegions(config?.regions || []);
+      setSelectedManualRegion(config?.selectedRegion || '');
+      setSelectedOriginalResolutionState(config?.selectedResolution || '');
       setManualInputRegion(
         isValidInputRegion(config as InputRegion) ? (config as InputRegion) : null
       );
@@ -82,18 +90,41 @@ export const OriginalResolution = () => {
     return rsp;
   }
 
-  async function applyResolution(key: string) {
+  async function applyOriginalResolution(key: string) {
     const rsp = await setSelectedOriginalResolution(key);
     if (rsp.code !== 0) {
       messageApi.error(t('screen.controlRegion.saveFailed'));
       return;
     }
-    setSelectedResolution(key);
+    setSelectedOriginalResolutionState(key);
+    setSelectedManualRegion('');
+    if (!key) setInputRegion(null);
     setIsPopoverOpen(true);
   }
 
-  async function saveResolutions(next: ResolutionPreset[], nextSelected = selectedResolution) {
-    const rsp = await setOriginalResolutionConfig(next, nextSelected);
+  async function applyManualRegion(key: string) {
+    const rsp = await saveManualRegions(manualRegions, key);
+    if (rsp.code !== 0) {
+      messageApi.error(t('screen.controlRegion.saveFailed'));
+      return;
+    }
+    setSelectedManualRegion(key);
+    setSelectedOriginalResolutionState('');
+    setInputRegion(
+      manualRegions.find((region) => `${region.width}x${region.height}` === key) || null
+    );
+    setIsPopoverOpen(true);
+  }
+
+  async function saveResolutions(
+    next: ResolutionPreset[],
+    nextSelected = selectedOriginalResolution
+  ) {
+    const rsp = await setOriginalResolutionConfig(
+      next,
+      nextSelected,
+      nextSelected ? '' : selectedManualRegion
+    );
     if (rsp.code !== 0) {
       messageApi.error(t('screen.controlRegion.saveFailed'));
       return false;
@@ -122,7 +153,7 @@ export const OriginalResolution = () => {
   async function deleteResolution(index: number) {
     if (index < 0 || index >= resolutions.length) return;
     const deleted = resolutionKey(resolutions[index]);
-    const nextSelected = selectedResolution === deleted ? '' : selectedResolution;
+    const nextSelected = selectedOriginalResolution === deleted ? '' : selectedOriginalResolution;
     if (
       await saveResolutions(
         resolutions.filter((_, itemIndex) => itemIndex !== index),
@@ -130,12 +161,29 @@ export const OriginalResolution = () => {
       )
     ) {
       if (!nextSelected) {
-        setSelectedResolution('');
-        setInputRegion(manualInputRegion);
+        setSelectedOriginalResolutionState('');
+        setInputRegion(null);
       }
     }
   }
 
+  async function deleteManualRegion(index: number) {
+    if (index < 0 || index >= manualRegions.length) return;
+    const deleted = `${manualRegions[index].width}x${manualRegions[index].height}`;
+    const nextSelected = selectedManualRegion === deleted ? '' : selectedManualRegion;
+    const next = manualRegions.filter((_, itemIndex) => itemIndex !== index);
+    const rsp = await saveManualRegions(next, nextSelected, selectedOriginalResolution);
+    if (rsp.code !== 0) {
+      messageApi.error(t('screen.controlRegion.saveFailed'));
+      return;
+    }
+    setManualRegions(next);
+    if (!nextSelected) {
+      setSelectedManualRegion('');
+      setInputRegion(null);
+    }
+  }
+
   async function updateMode(nextMode: ControlRegionMode) {
     const rsp = await setControlRegionMode(nextMode);
     if (rsp.code !== 0) {
@@ -148,9 +196,14 @@ export const OriginalResolution = () => {
       const manualRegion = isValidInputRegion(config.data as InputRegion)
         ? (config.data as InputRegion)
         : null;
+      const selectedRegion = (config.data as ControlRegionConfig)?.selectedRegion || '';
+      const selectedResolution = (config.data as ControlRegionConfig)?.selectedResolution || '';
+      const regions = (config.data as ControlRegionConfig)?.regions || [];
       setManualInputRegion(manualRegion);
       setInputRegion(
-        (config.data as ControlRegionConfig)?.selectedResolution ? null : manualRegion
+        selectedResolution
+          ? null
+          : regions.find((region) => `${region.width}x${region.height}` === selectedRegion) || null
       );
     } else {
       setInputRegion(null);
@@ -195,19 +248,58 @@ export const OriginalResolution = () => {
             <Button block type="primary" icon={<ScanSearchIcon size={14} />} onClick={selectArea}>
               {t('screen.controlRegion.select')}
             </Button>
+            <Typography.Text>{t('screen.controlRegion.selectedResolution')}</Typography.Text>
+            <Select
+              className="w-full"
+              value={selectedManualRegion}
+              options={[
+                { label: t('screen.controlRegion.unused'), value: '' },
+                ...manualRegions.map((region) => ({
+                  label: `${region.width}x${region.height}`,
+                  value: `${region.width}x${region.height}`
+                }))
+              ]}
+              optionRender={(option) => (
+                <div className="flex items-center justify-between">
+                  <span>{option.label}</span>
+                  {option.value !== '' && (
+                    <Button
+                      type="text"
+                      danger
+                      size="small"
+                      icon={<DeleteOutlined />}
+                      onMouseDown={(event) => {
+                        event.preventDefault();
+                        event.stopPropagation();
+                      }}
+                      onClick={(event) => {
+                        event.stopPropagation();
+                        deleteManualRegion(
+                          manualRegions.findIndex(
+                            (region) => `${region.width}x${region.height}` === option.value
+                          )
+                        );
+                      }}
+                    />
+                  )}
+                </div>
+              )}
+              onChange={applyManualRegion}
+            />
             <Typography.Text>{t('screen.controlRegion.originalResolution')}</Typography.Text>
             <Space.Compact block>
               <Select
                 className="w-full"
-                value={selectedResolution}
+                value={selectedOriginalResolution}
                 placeholder={t('screen.controlRegion.selectResolution')}
                 getPopupContainer={(trigger) => trigger.parentElement || document.body}
-                options={resolutions
-                  .map((resolution) => ({
+                options={[
+                  { label: t('screen.controlRegion.unused'), value: '' },
+                  ...resolutions.map((resolution) => ({
                     label: resolutionKey(resolution),
                     value: resolutionKey(resolution)
                   }))
-                  .concat([{ label: t('screen.controlRegion.useSelectedArea'), value: '' }])}
+                ]}
                 optionRender={(option) => (
                   <div className="flex items-center justify-between">
                     <span>{option.label}</span>
@@ -233,7 +325,7 @@ export const OriginalResolution = () => {
                     )}
                   </div>
                 )}
-                onChange={applyResolution}
+                onChange={applyOriginalResolution}
               />
               <Tooltip title={t('screen.controlRegion.addResolution')}>
                 <Button icon={<PlusOutlined />} onClick={() => setIsAddOpen(true)} />
diff --git a/web/src/pages/desktop/menu/screen/quality.tsx b/web/src/pages/desktop/menu/screen/quality.tsx
index 34580b6..10d04d2 100644
--- a/web/src/pages/desktop/menu/screen/quality.tsx
+++ b/web/src/pages/desktop/menu/screen/quality.tsx
@@ -7,7 +7,7 @@ import { updateScreen } from '@/api/vm';
 import { setQuality as setCookie } from '@/lib/localstorage.ts';
 import { videoModeAtom } from '@/jotai/screen.ts';
 
-import { BitRateMap, QualityMap } from './constants.ts';
+import { getQualityMap } from './constants.ts';
 
 type QualityProps = {
   quality: number;
@@ -26,7 +26,11 @@ export const Quality = ({ quality, setQuality }: QualityProps) => {
   ];
 
   async function update(key: number) {
-    const value = videoMode === 'mjpeg' ? QualityMap.get(key)! : BitRateMap.get(key)!;
+    const qualityMap = getQualityMap(videoMode);
+    const value = qualityMap?.get(key);
+    if (value === undefined) {
+      return;
+    }
 
     const rsp = await updateScreen('quality', value);
     if (rsp.code !== 0) {
diff --git a/web/src/pages/desktop/screen/auto-region.tsx b/web/src/pages/desktop/screen/auto-region.tsx
index 80d2716..2168ac5 100644
--- a/web/src/pages/desktop/screen/auto-region.tsx
+++ b/web/src/pages/desktop/screen/auto-region.tsx
@@ -4,14 +4,16 @@ import { useAtomValue, useSetAtom } from 'jotai';
 import {
   controlRegionModeAtom,
   inputRegionAtom,
-  inputRegionSelectingAtom
+  inputRegionSelectingAtom,
+  resolutionAtom
 } from '@/jotai/screen.ts';
 
-import { detectFrameContent, getMediaSize, isMediaReady } from './geometry.ts';
+import { detectFrameContent, getMediaSize } from './geometry.ts';
 
 export const AutoRegion = () => {
   const mode = useAtomValue(controlRegionModeAtom);
   const selecting = useAtomValue(inputRegionSelectingAtom);
+  const resolution = useAtomValue(resolutionAtom);
   const setInputRegion = useSetAtom(inputRegionAtom);
 
   useEffect(() => {
@@ -19,18 +21,25 @@ export const AutoRegion = () => {
       return;
     }
 
-    const screen = document.getElementById('screen');
-    if (!screen) return;
-    const target = screen;
     let stopped = false;
+    let target: Element | null = null;
     let candidate = '';
     let confirmations = 0;
 
     const detect = () => {
-      if (stopped || !isMediaReady(target)) return;
-      const mediaSize = getMediaSize(target);
+      if (stopped) return;
+
+      const screen = document.getElementById('screen');
+      if (!screen) return;
+      if (screen !== target) {
+        target = screen;
+        candidate = '';
+        confirmations = 0;
+      }
+
+      const mediaSize = getMediaSize(screen, resolution);
       if (!mediaSize) return;
-      const content = detectFrameContent(target, mediaSize);
+      const content = detectFrameContent(screen, mediaSize);
       const key = [
         mediaSize.width,
         mediaSize.height,
@@ -65,7 +74,7 @@ export const AutoRegion = () => {
       stopped = true;
       window.clearInterval(timer);
     };
-  }, [mode, selecting, setInputRegion]);
+  }, [mode, resolution, selecting, setInputRegion]);
 
   useEffect(() => {
     if (mode !== 'auto') setInputRegion(null);
diff --git a/web/src/pages/desktop/screen/geometry.ts b/web/src/pages/desktop/screen/geometry.ts
index 1a7fccd..bf8290c 100644
--- a/web/src/pages/desktop/screen/geometry.ts
+++ b/web/src/pages/desktop/screen/geometry.ts
@@ -15,6 +15,10 @@ export type FrameContent = {
 export type RenderedMediaRect = FrameContent;
 
 const aspectRatioTolerance = 0.01;
+const mediaWidthAttribute = 'data-media-width';
+const mediaHeightAttribute = 'data-media-height';
+const blackPixelThreshold = 32;
+const darkSampleRatio = 0.75;
 
 export const fullFrameContent = (mediaSize: MediaSize): FrameContent => ({
   left: 0,
@@ -23,7 +27,13 @@ export const fullFrameContent = (mediaSize: MediaSize): FrameContent => ({
   height: mediaSize.height
 });
 
-export function getMediaSize(screen: Element): MediaSize | null {
+export function getMediaSize(screen: Element, fallback?: MediaSize | null): MediaSize | null {
+  const dataWidth = Number(screen.getAttribute(mediaWidthAttribute));
+  const dataHeight = Number(screen.getAttribute(mediaHeightAttribute));
+  if (dataWidth > 0 && dataHeight > 0) {
+    return { width: dataWidth, height: dataHeight };
+  }
+
   if (screen instanceof HTMLVideoElement && screen.videoWidth > 0 && screen.videoHeight > 0) {
     return { width: screen.videoWidth, height: screen.videoHeight };
   }
@@ -32,28 +42,20 @@ export function getMediaSize(screen: Element): MediaSize | null {
     return { width: screen.naturalWidth, height: screen.naturalHeight };
   }
 
-  if (screen instanceof HTMLCanvasElement) {
-    const width = Number(screen.dataset.mediaWidth);
-    const height = Number(screen.dataset.mediaHeight);
-    if (width > 0 && height > 0) {
-      return { width, height };
-    }
-  }
-
-  return null;
+  return fallback && fallback.width > 0 && fallback.height > 0 ? fallback : null;
 }
 
 export function isMediaReady(screen: Element) {
   if (screen instanceof HTMLVideoElement) {
-    return screen.readyState >= 2 && screen.videoWidth > 0 && screen.videoHeight > 0;
+    return screen.readyState >= 2 && !!getMediaSize(screen);
   }
 
   if (screen instanceof HTMLImageElement) {
-    return screen.complete && screen.naturalWidth > 0 && screen.naturalHeight > 0;
+    return !!getMediaSize(screen);
   }
 
   if (screen instanceof HTMLCanvasElement) {
-    return Number(screen.dataset.mediaWidth) > 0 && Number(screen.dataset.mediaHeight) > 0;
+    return !!getMediaSize(screen);
   }
 
   return false;
@@ -73,20 +75,33 @@ export function detectFrameContent(screen: Element, mediaSize: MediaSize): Frame
 
   try {
     const pixels = context.getImageData(0, 0, width, height).data;
-    const left = findBorderInset(pixels, width, height, true, 'horizontal');
-    const right = findBorderInset(pixels, width, height, false, 'horizontal');
-    const top = findBorderInset(pixels, width, height, true, 'vertical');
-    const bottom = findBorderInset(pixels, width, height, false, 'vertical');
-    const horizontalBorder =
-      left >= Math.max(4, Math.round(width * 0.02)) &&
-      right >= Math.max(4, Math.round(width * 0.02)) &&
-      left + right < width * 0.4 &&
-      Math.abs(left - right) <= Math.max(4, Math.round(width * 0.05));
-    const verticalBorder =
-      top >= Math.max(4, Math.round(height * 0.02)) &&
-      bottom >= Math.max(4, Math.round(height * 0.02)) &&
-      top + bottom < height * 0.4 &&
-      Math.abs(top - bottom) <= Math.max(4, Math.round(height * 0.05));
+    let top = findBorderInset(pixels, width, height, true, 'vertical');
+    let bottom = findBorderInset(pixels, width, height, false, 'vertical');
+    let verticalBorder = isSymmetricBorder(top, bottom, height);
+    const left = findBorderInset(
+      pixels,
+      width,
+      height,
+      true,
+      'horizontal',
+      verticalBorder ? top : 0,
+      verticalBorder ? height - bottom : height
+    );
+    const right = findBorderInset(
+      pixels,
+      width,
+      height,
+      false,
+      'horizontal',
+      verticalBorder ? top : 0,
+      verticalBorder ? height - bottom : height
+    );
+    const horizontalBorder = isSymmetricBorder(left, right, width);
+    if (horizontalBorder) {
+      top = findBorderInset(pixels, width, height, true, 'vertical', left, width - right);
+      bottom = findBorderInset(pixels, width, height, false, 'vertical', left, width - right);
+      verticalBorder = isSymmetricBorder(top, bottom, height);
+    }
     const frameLeft = horizontalBorder ? (left / width) * mediaSize.width : 0;
     const frameRight = horizontalBorder ? (right / width) * mediaSize.width : 0;
     const frameTop = verticalBorder ? (top / height) * mediaSize.height : 0;
@@ -128,28 +143,43 @@ function findBorderInset(
   width: number,
   height: number,
   fromStart: boolean,
-  axis: 'horizontal' | 'vertical'
+  axis: 'horizontal' | 'vertical',
+  sampleStart = 0,
+  sampleEnd = axis === 'horizontal' ? height : width
 ) {
   const scanSize = axis === 'horizontal' ? width : height;
-  const sampleSize = axis === 'horizontal' ? height : width;
-  const lines = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9].map((ratio) =>
-    Math.round((sampleSize - 1) * ratio)
+  const sampleSize = Math.max(1, sampleEnd - sampleStart);
+  const lines = [0.1, 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, 0.9].map(
+    (ratio) => sampleStart + Math.round((sampleSize - 1) * ratio)
   );
   const limit = Math.floor(scanSize * 0.45);
   let inset = 0;
   for (let offset = 0; offset < limit; offset++) {
-    const black = lines.every((line) => {
+    const darkSamples = lines.filter((line) => {
       const x = axis === 'horizontal' ? (fromStart ? offset : width - offset - 1) : line;
       const y = axis === 'horizontal' ? line : fromStart ? offset : height - offset - 1;
       const index = (y * width + x) * 4;
-      return pixels[index] === 0 && pixels[index + 1] === 0 && pixels[index + 2] === 0;
-    });
+      return (
+        pixels[index] <= blackPixelThreshold &&
+        pixels[index + 1] <= blackPixelThreshold &&
+        pixels[index + 2] <= blackPixelThreshold
+      );
+    }).length;
+    const black = darkSamples / lines.length >= darkSampleRatio;
     if (!black) break;
     inset = offset + 1;
   }
   return inset;
 }
 
+function isSymmetricBorder(start: number, end: number, size: number) {
+  return (
+    start >= Math.max(4, Math.round(size * 0.02)) &&
+    end >= Math.max(4, Math.round(size * 0.02)) &&
+    Math.abs(start - end) <= Math.max(4, Math.round(size * 0.05))
+  );
+}
+
 export function getRenderedMediaRect(
   elementRect: DOMRect,
   mediaSize: MediaSize
diff --git a/web/src/pages/desktop/screen/index.tsx b/web/src/pages/desktop/screen/index.tsx
index 06965ed..0237f70 100644
--- a/web/src/pages/desktop/screen/index.tsx
+++ b/web/src/pages/desktop/screen/index.tsx
@@ -17,5 +17,9 @@ export const Screen = () => {
     return <H264Direct />;
   }
 
-  return <H264Webrtc />;
+  if (videoMode === 'h264') {
+    return <H264Webrtc />;
+  }
+
+  return null;
 };
diff --git a/web/src/pages/desktop/screen/input-region-overlay.tsx b/web/src/pages/desktop/screen/input-region-overlay.tsx
index 642fbf2..d4d9e1d 100644
--- a/web/src/pages/desktop/screen/input-region-overlay.tsx
+++ b/web/src/pages/desktop/screen/input-region-overlay.tsx
@@ -12,6 +12,9 @@ import {
   inputRegionAtom,
   inputRegionSelectingAtom,
   manualInputRegionAtom,
+  manualRegionsAtom,
+  resolutionAtom,
+  selectedManualRegionAtom,
   selectedOriginalResolutionAtom,
   videoScaleAtom
 } from '@/jotai/screen.ts';
@@ -75,6 +78,7 @@ const resizeHandles: Array<{
 ];
 
 const minimumSelectionSize = 4;
+const edgeSnapDistance = 8;
 
 export const InputRegionOverlay = () => {
   const { t } = useTranslation();
@@ -82,6 +86,9 @@ export const InputRegionOverlay = () => {
   const [selecting, setSelecting] = useAtom(inputRegionSelectingAtom);
   const [, setInputRegionState] = useAtom(inputRegionAtom);
   const setManualInputRegion = useSetAtom(manualInputRegionAtom);
+  const [manualRegions, setManualRegions] = useAtom(manualRegionsAtom);
+  const resolution = useAtomValue(resolutionAtom);
+  const setSelectedManualRegion = useSetAtom(selectedManualRegionAtom);
   const setSelectedOriginalResolution = useSetAtom(selectedOriginalResolutionAtom);
   const videoScale = useAtomValue(videoScaleAtom);
   const setVideoScale = useSetAtom(videoScaleAtom);
@@ -151,17 +158,15 @@ export const InputRegionOverlay = () => {
       return;
     }
 
-    const screen = document.getElementById('screen');
-    if (!screen) {
-      setFrameRect(null);
-      setMediaSize(null);
-      frameRectRef.current = null;
-      return;
-    }
-    const target = screen;
-
     function updateFrame() {
-      const nextMediaSize = getMediaSize(target);
+      const target = document.getElementById('screen');
+      if (!target) {
+        setFrameRect(null);
+        setMediaSize(null);
+        frameRectRef.current = null;
+        return;
+      }
+      const nextMediaSize = getMediaSize(target, resolution);
       const bounds = target.getBoundingClientRect();
       if (!nextMediaSize || bounds.width <= 0 || bounds.height <= 0) {
         setFrameRect(null);
@@ -192,31 +197,16 @@ export const InputRegionOverlay = () => {
     }
 
     updateFrame();
-    const resizeObserver = new ResizeObserver(updateFrame);
-    resizeObserver.observe(target);
-    const mutationObserver = new MutationObserver(updateFrame);
-    mutationObserver.observe(target, {
-      attributes: true,
-      attributeFilter: ['data-media-width', 'data-media-height']
-    });
     window.addEventListener('resize', updateFrame);
     window.addEventListener('scroll', updateFrame, true);
-    target.addEventListener('load', updateFrame);
-    target.addEventListener('loadedmetadata', updateFrame);
-    target.addEventListener('canplay', updateFrame);
-    target.addEventListener('resize', updateFrame);
+    const timer = window.setInterval(updateFrame, 250);
 
     return () => {
-      resizeObserver.disconnect();
-      mutationObserver.disconnect();
       window.removeEventListener('resize', updateFrame);
       window.removeEventListener('scroll', updateFrame, true);
-      target.removeEventListener('load', updateFrame);
-      target.removeEventListener('loadedmetadata', updateFrame);
-      target.removeEventListener('canplay', updateFrame);
-      target.removeEventListener('resize', updateFrame);
+      window.clearInterval(timer);
     };
-  }, [selecting, videoScale]);
+  }, [resolution, selecting, videoScale]);
 
   useEffect(() => {
     if (!selecting) {
@@ -345,12 +335,20 @@ export const InputRegionOverlay = () => {
       return null;
     }
 
+    const right = frameRect.left + frameRect.width;
+    const bottom = frameRect.top + frameRect.height;
     return {
-      x: Math.max(frameRect.left, Math.min(frameRect.left + frameRect.width, x)),
-      y: Math.max(frameRect.top, Math.min(frameRect.top + frameRect.height, y))
+      x: snapToEdge(Math.max(frameRect.left, Math.min(right, x)), frameRect.left, right),
+      y: snapToEdge(Math.max(frameRect.top, Math.min(bottom, y)), frameRect.top, bottom)
     };
   }
 
+  function snapToEdge(value: number, start: number, end: number) {
+    if (Math.abs(value - start) <= edgeSnapDistance) return start;
+    if (Math.abs(value - end) <= edgeSnapDistance) return end;
+    return value;
+  }
+
   function updateSelection(x: number, y: number) {
     const start = dragStartRef.current;
     const point = clampPoint(x, y);
@@ -448,17 +446,19 @@ export const InputRegionOverlay = () => {
     setCursorPoint(point);
   }
 
-  function handlePointerDown(event: PointerEvent<HTMLDivElement>) {
-    if (
-      !frameRect ||
-      event.clientX < frameRect.left ||
-      event.clientX > frameRect.left + frameRect.width ||
-      event.clientY < frameRect.top ||
-      event.clientY > frameRect.top + frameRect.height
-    ) {
+  function updateHoverCursorPoint(x: number, y: number) {
+    if (!frameRect || selection) {
+      updateCursorPoint(x, y);
       return;
     }
 
+    const point = clampPoint(x, y);
+    if (point) {
+      updateCursorPoint(point.x, point.y, true);
+    }
+  }
+
+  function handlePointerDown(event: PointerEvent<HTMLDivElement>) {
     const point = clampPoint(event.clientX, event.clientY);
     if (!point) {
       return;
@@ -480,11 +480,14 @@ export const InputRegionOverlay = () => {
       setCursorPoint(null);
     } else if (resizeRef.current) {
       updateResizedSelection(event.clientX, event.clientY);
-    } else {
-      updateCursorPoint(event.clientX, event.clientY, dragging);
-      if (dragging) {
-        updateSelection(event.clientX, event.clientY);
+    } else if (dragging) {
+      const point = clampPoint(event.clientX, event.clientY);
+      if (point) {
+        updateCursorPoint(point.x, point.y, true);
+        updateSelection(point.x, point.y);
       }
+    } else {
+      updateHoverCursorPoint(event.clientX, event.clientY);
     }
     if (moveRef.current) {
       updateMovedSelection(event.clientX, event.clientY);
@@ -575,14 +578,20 @@ export const InputRegionOverlay = () => {
       width: Math.max(1, right - left),
       height: Math.max(1, bottom - top)
     };
+    const key = `${region.width}x${region.height}`;
+    const regions = manualRegions.some((item) => `${item.width}x${item.height}` === key)
+      ? manualRegions.map((item) => (`${item.width}x${item.height}` === key ? region : item))
+      : [...manualRegions, region];
 
-    const rsp = await setInputRegionConfig(region, '');
+    const rsp = await setInputRegionConfig(region, regions, key);
     if (rsp.code !== 0) {
       setError(t('screen.controlRegion.saveFailed'));
       return;
     }
 
     setManualInputRegion(region);
+    setManualRegions(regions);
+    setSelectedManualRegion(key);
     setSelectedOriginalResolution('');
     setInputRegionState(region);
     cursorPointRef.current = null;
diff --git a/web/src/pages/desktop/screen/manual-region.tsx b/web/src/pages/desktop/screen/manual-region.tsx
index 17a101f..ce4c31a 100644
--- a/web/src/pages/desktop/screen/manual-region.tsx
+++ b/web/src/pages/desktop/screen/manual-region.tsx
@@ -4,7 +4,9 @@ import { useAtomValue, useSetAtom } from 'jotai';
 import {
   controlRegionModeAtom,
   inputRegionAtom,
-  manualInputRegionAtom,
+  manualRegionsAtom,
+  resolutionAtom,
+  selectedManualRegionAtom,
   selectedOriginalResolutionAtom
 } from '@/jotai/screen.ts';
 
@@ -12,52 +14,47 @@ import { getCenteredInputRegionByAspectRatio, getMediaSize } from './geometry.ts
 
 export const ManualRegion = () => {
   const mode = useAtomValue(controlRegionModeAtom);
-  const selected = useAtomValue(selectedOriginalResolutionAtom);
-  const manualRegion = useAtomValue(manualInputRegionAtom);
+  const selectedOriginal = useAtomValue(selectedOriginalResolutionAtom);
+  const selectedManual = useAtomValue(selectedManualRegionAtom);
+  const manualRegions = useAtomValue(manualRegionsAtom);
+  const resolution = useAtomValue(resolutionAtom);
   const setInputRegion = useSetAtom(inputRegionAtom);
 
   useEffect(() => {
     if (mode !== 'manual') return;
-    if (!selected) {
-      setInputRegion(manualRegion);
+    if (selectedManual) {
+      setInputRegion(
+        manualRegions.find((region) => `${region.width}x${region.height}` === selectedManual) ||
+          null
+      );
       return;
     }
 
-    const [width, height] = selected.split('x').map(Number);
-    if (manualRegion?.width === width && manualRegion.height === height) {
-      setInputRegion(manualRegion);
-      return;
-    }
-    const screen = document.getElementById('screen');
-    if (!screen || !width || !height) {
+    if (!selectedOriginal) {
       setInputRegion(null);
       return;
     }
-    const target = screen;
+
+    const [width, height] = selectedOriginal.split('x').map(Number);
+    if (!width || !height) {
+      setInputRegion(null);
+      return;
+    }
+
     const update = () => {
-      const mediaSize = getMediaSize(target);
+      const target = document.getElementById('screen');
+      if (!target) return;
+      const mediaSize = getMediaSize(target, resolution);
       setInputRegion(
         mediaSize ? getCenteredInputRegionByAspectRatio(width, height, mediaSize) : null
       );
     };
     update();
-    const observer = new MutationObserver(update);
-    observer.observe(target, {
-      attributes: true,
-      attributeFilter: ['data-media-width', 'data-media-height']
-    });
-    target.addEventListener('load', update);
-    target.addEventListener('loadedmetadata', update);
-    target.addEventListener('canplay', update);
-    target.addEventListener('resize', update);
+    const timer = window.setInterval(update, 250);
     return () => {
-      observer.disconnect();
-      target.removeEventListener('load', update);
-      target.removeEventListener('loadedmetadata', update);
-      target.removeEventListener('canplay', update);
-      target.removeEventListener('resize', update);
+      window.clearInterval(timer);
     };
-  }, [manualRegion, mode, selected, setInputRegion]);
+  }, [manualRegions, mode, resolution, selectedManual, selectedOriginal, setInputRegion]);
 
   return null;
 };
diff --git a/web/src/types/index.ts b/web/src/types/index.ts
index 5787acc..6a01a90 100644
--- a/web/src/types/index.ts
+++ b/web/src/types/index.ts
@@ -20,4 +20,6 @@ export type ControlRegionConfig = Partial<InputRegion> & {
   mode: ControlRegionMode;
   resolutions?: OriginalResolution[];
   selectedResolution?: string;
+  regions?: InputRegion[];
+  selectedRegion?: string;
 };