diff --git a/Downterm/CommandNotch.xcodeproj/project.xcworkspace/xcuserdata/harvmaster.xcuserdatad/UserInterfaceState.xcuserstate b/Downterm/CommandNotch.xcodeproj/project.xcworkspace/xcuserdata/harvmaster.xcuserdatad/UserInterfaceState.xcuserstate
index 6c75193..f499c48 100644
Binary files a/Downterm/CommandNotch.xcodeproj/project.xcworkspace/xcuserdata/harvmaster.xcuserdatad/UserInterfaceState.xcuserstate and b/Downterm/CommandNotch.xcodeproj/project.xcworkspace/xcuserdata/harvmaster.xcuserdatad/UserInterfaceState.xcuserstate differ
diff --git a/Downterm/CommandNotch/ContentView.swift b/Downterm/CommandNotch/ContentView.swift
index 528c7f5..9ab597e 100644
--- a/Downterm/CommandNotch/ContentView.swift
+++ b/Downterm/CommandNotch/ContentView.swift
@@ -151,7 +151,7 @@ struct ContentView: View {
     }
 
     private var sizeAnimation: Animation? {
-        guard !vm.isUserResizing else { return nil }
+        guard !vm.isUserResizing, !vm.isPresetResizing else { return nil }
         return vm.notchState == .open ? vm.openAnimation : vm.closeAnimation
     }
 
diff --git a/Downterm/CommandNotch/Managers/ScreenManager.swift b/Downterm/CommandNotch/Managers/ScreenManager.swift
index 79c2297..4abb6f6 100644
--- a/Downterm/CommandNotch/Managers/ScreenManager.swift
+++ b/Downterm/CommandNotch/Managers/ScreenManager.swift
@@ -11,9 +11,11 @@ class ScreenManager: ObservableObject {
 
     static let shared = ScreenManager()
     private let focusRetryDelay: TimeInterval = 0.01
+    private let presetResizeFrameInterval: TimeInterval = 1.0 / 60.0
 
     private(set) var windows: [String: NotchWindow] = [:]
     private(set) var viewModels: [String: NotchViewModel] = [:]
+    private var presetResizeTimers: [String: Timer] = [:]
 
     @AppStorage(NotchSettings.Keys.showOnAllDisplays)
     private var showOnAllDisplays = NotchSettings.Defaults.showOnAllDisplays
@@ -140,10 +142,9 @@ class ScreenManager: ObservableObject {
             return
         }
 
-        withAnimation(vm.openAnimation) {
-            vm.applySizePreset(preset, notifyWindowResize: false)
-        }
-        updateWindowFrame(for: screenUUID, centerHorizontally: true)
+        let startSize = vm.notchSize
+        let targetSize = vm.setStoredOpenSize(preset.size)
+        animatePresetResize(for: screenUUID, from: startSize, to: targetSize, duration: vm.openAnimationDuration)
     }
 
     // MARK: - Window creation
@@ -236,10 +237,28 @@ class ScreenManager: ObservableObject {
         window: NotchWindow,
         centerHorizontally: Bool = false
     ) {
-        guard let vm = viewModels[screenUUID] else { return }
+        let frame = targetWindowFrame(
+            for: screenUUID,
+            on: screen,
+            window: window,
+            centerHorizontally: centerHorizontally,
+            contentSize: nil
+        )
+        guard !window.frame.equalTo(frame) else { return }
+        window.setFrame(frame, display: false)
+    }
+
+    private func targetWindowFrame(
+        for screenUUID: String,
+        on screen: NSScreen,
+        window: NotchWindow,
+        centerHorizontally: Bool,
+        contentSize: CGSize?
+    ) -> NSRect {
+        guard let vm = viewModels[screenUUID] else { return window.frame }
 
         let shadowPadding: CGFloat = 20
-        let openSize = vm.openNotchSize
+        let openSize = contentSize ?? vm.openNotchSize
         let windowWidth = openSize.width + 40
         let windowHeight = openSize.height + shadowPadding
         let centeredX = screen.frame.origin.x + (screen.frame.width - windowWidth) / 2
@@ -248,12 +267,87 @@ class ScreenManager: ObservableObject {
             ? centeredX
             : min(max(window.frame.minX, screen.frame.minX), screen.frame.maxX - windowWidth)
 
-        let frame = NSRect(
+        return NSRect(
             x: x,
             y: screen.frame.origin.y + screen.frame.height - windowHeight,
             width: windowWidth,
             height: windowHeight
         )
+    }
+
+    private func animatePresetResize(
+        for screenUUID: String,
+        from startSize: CGSize,
+        to targetSize: CGSize,
+        duration: TimeInterval
+    ) {
+        cancelPresetResize(for: screenUUID)
+
+        guard let vm = viewModels[screenUUID] else { return }
+        guard startSize != targetSize else {
+            vm.notchSize = targetSize
+            updateWindowFrame(for: screenUUID, centerHorizontally: true)
+            return
+        }
+
+        vm.isPresetResizing = true
+        let startTime = CACurrentMediaTime()
+        let duration = max(duration, presetResizeFrameInterval)
+
+        let timer = Timer(timeInterval: presetResizeFrameInterval, repeats: true) { [weak self] timer in
+            MainActor.assumeIsolated {
+                guard let self, let vm = self.viewModels[screenUUID] else {
+                    timer.invalidate()
+                    return
+                }
+
+                let elapsed = CACurrentMediaTime() - startTime
+                let progress = min(1, elapsed / duration)
+                let easedProgress = 0.5 - (cos(.pi * progress) / 2)
+                let size = CGSize(
+                    width: startSize.width + ((targetSize.width - startSize.width) * easedProgress),
+                    height: startSize.height + ((targetSize.height - startSize.height) * easedProgress)
+                )
+
+                vm.notchSize = size
+                self.updateWindowFrame(for: screenUUID, contentSize: size, centerHorizontally: true)
+
+                if progress >= 1 {
+                    vm.notchSize = targetSize
+                    vm.isPresetResizing = false
+                    self.updateWindowFrame(for: screenUUID, contentSize: targetSize, centerHorizontally: true)
+                    self.presetResizeTimers[screenUUID] = nil
+                    timer.invalidate()
+                }
+            }
+        }
+
+        presetResizeTimers[screenUUID] = timer
+        RunLoop.main.add(timer, forMode: .common)
+        timer.fire()
+    }
+
+    private func cancelPresetResize(for screenUUID: String) {
+        presetResizeTimers[screenUUID]?.invalidate()
+        presetResizeTimers[screenUUID] = nil
+        viewModels[screenUUID]?.isPresetResizing = false
+    }
+
+    private func updateWindowFrame(
+        for screenUUID: String,
+        contentSize: CGSize,
+        centerHorizontally: Bool = false
+    ) {
+        guard let screen = NSScreen.screens.first(where: { $0.displayUUID == screenUUID }),
+              let window = windows[screenUUID] else { return }
+
+        let frame = targetWindowFrame(
+            for: screenUUID,
+            on: screen,
+            window: window,
+            centerHorizontally: centerHorizontally,
+            contentSize: contentSize
+        )
         guard !window.frame.equalTo(frame) else { return }
         window.setFrame(frame, display: false)
     }
@@ -261,6 +355,10 @@ class ScreenManager: ObservableObject {
     // MARK: - Cleanup
 
     private func cleanupAllWindows() {
+        for (_, timer) in presetResizeTimers {
+            timer.invalidate()
+        }
+        presetResizeTimers.removeAll()
         for (_, window) in windows {
             window.orderOut(nil)
             window.close()
diff --git a/Downterm/CommandNotch/Models/NotchSettings.swift b/Downterm/CommandNotch/Models/NotchSettings.swift
index 0c2d4f8..796cb8a 100644
--- a/Downterm/CommandNotch/Models/NotchSettings.swift
+++ b/Downterm/CommandNotch/Models/NotchSettings.swift
@@ -37,6 +37,7 @@ enum NotchSettings {
         static let closeSpringDamping    = "closeSpringDamping"
         static let hoverSpringResponse   = "hoverSpringResponse"
         static let hoverSpringDamping    = "hoverSpringDamping"
+        static let resizeAnimationDuration = "resizeAnimationDuration"
 
         // Behavior
         static let enableGestures        = "enableGestures"
@@ -85,6 +86,7 @@ enum NotchSettings {
         static let closeSpringDamping: Double   = 1.0
         static let hoverSpringResponse: Double  = 0.38
         static let hoverSpringDamping: Double   = 0.8
+        static let resizeAnimationDuration: Double = 0.42
 
         static let enableGestures: Bool         = true
         static let gestureSensitivity: Double   = 0.5
@@ -132,6 +134,7 @@ enum NotchSettings {
             Keys.closeSpringDamping:    Defaults.closeSpringDamping,
             Keys.hoverSpringResponse:   Defaults.hoverSpringResponse,
             Keys.hoverSpringDamping:    Defaults.hoverSpringDamping,
+            Keys.resizeAnimationDuration: Defaults.resizeAnimationDuration,
 
             Keys.enableGestures:        Defaults.enableGestures,
             Keys.gestureSensitivity:    Defaults.gestureSensitivity,
diff --git a/Downterm/CommandNotch/Models/NotchViewModel.swift b/Downterm/CommandNotch/Models/NotchViewModel.swift
index 667d6ef..e3a3632 100644
--- a/Downterm/CommandNotch/Models/NotchViewModel.swift
+++ b/Downterm/CommandNotch/Models/NotchViewModel.swift
@@ -18,6 +18,7 @@ class NotchViewModel: ObservableObject {
     @Published var isCloseTransitionActive: Bool = false
     @Published var suppressHoverOpenUntilHoverExit: Bool = false
     @Published var isUserResizing: Bool = false
+    @Published var isPresetResizing: Bool = false
 
     let terminalManager = TerminalManager.shared
 
@@ -36,6 +37,7 @@ class NotchViewModel: ObservableObject {
     @AppStorage(NotchSettings.Keys.openSpringDamping)   private var openSpringDamping   = NotchSettings.Defaults.openSpringDamping
     @AppStorage(NotchSettings.Keys.closeSpringResponse) private var closeSpringResponse = NotchSettings.Defaults.closeSpringResponse
     @AppStorage(NotchSettings.Keys.closeSpringDamping)  private var closeSpringDamping  = NotchSettings.Defaults.closeSpringDamping
+    @AppStorage(NotchSettings.Keys.resizeAnimationDuration) private var resizeAnimationDurationSetting = NotchSettings.Defaults.resizeAnimationDuration
 
     private var closeTransitionTask: Task<Void, Never>?
 
@@ -45,6 +47,9 @@ class NotchViewModel: ObservableObject {
     var closeAnimation: Animation {
         .spring(response: closeSpringResponse, dampingFraction: closeSpringDamping)
     }
+    var openAnimationDuration: TimeInterval {
+        max(0.05, resizeAnimationDurationSetting)
+    }
 
     init(screenUUID: String) {
         self.screenUUID = screenUUID
@@ -94,10 +99,16 @@ class NotchViewModel: ObservableObject {
     }
 
     @discardableResult
-    func setOpenSize(_ proposedSize: CGSize, notifyWindowResize: Bool) -> CGSize {
+    func setStoredOpenSize(_ proposedSize: CGSize) -> CGSize {
         let clampedSize = clampedOpenSize(proposedSize)
         openWidth = clampedSize.width
         openHeight = clampedSize.height
+        return clampedSize
+    }
+
+    @discardableResult
+    func setOpenSize(_ proposedSize: CGSize, notifyWindowResize: Bool) -> CGSize {
+        let clampedSize = setStoredOpenSize(proposedSize)
         if notchState == .open {
             notchSize = clampedSize
         }
diff --git a/Downterm/CommandNotch/Views/SettingsView.swift b/Downterm/CommandNotch/Views/SettingsView.swift
index 3fc55b1..e55e655 100644
--- a/Downterm/CommandNotch/Views/SettingsView.swift
+++ b/Downterm/CommandNotch/Views/SettingsView.swift
@@ -227,6 +227,7 @@ struct AnimationSettingsView: View {
     @AppStorage(NotchSettings.Keys.closeSpringDamping)   private var closeDamping   = NotchSettings.Defaults.closeSpringDamping
     @AppStorage(NotchSettings.Keys.hoverSpringResponse)  private var hoverResponse  = NotchSettings.Defaults.hoverSpringResponse
     @AppStorage(NotchSettings.Keys.hoverSpringDamping)   private var hoverDamping   = NotchSettings.Defaults.hoverSpringDamping
+    @AppStorage(NotchSettings.Keys.resizeAnimationDuration) private var resizeDuration = NotchSettings.Defaults.resizeAnimationDuration
 
     var body: some View {
         Form {
@@ -239,6 +240,9 @@ struct AnimationSettingsView: View {
             Section("Hover Animation") {
                 springControls(response: $hoverResponse, damping: $hoverDamping)
             }
+            Section("Resize Animation") {
+                durationControl(duration: $resizeDuration)
+            }
             Section {
                 Button("Reset to Defaults") {
                     openResponse  = NotchSettings.Defaults.openSpringResponse
@@ -247,6 +251,7 @@ struct AnimationSettingsView: View {
                     closeDamping  = NotchSettings.Defaults.closeSpringDamping
                     hoverResponse = NotchSettings.Defaults.hoverSpringResponse
                     hoverDamping  = NotchSettings.Defaults.hoverSpringDamping
+                    resizeDuration = NotchSettings.Defaults.resizeAnimationDuration
                 }
             }
         }
@@ -266,6 +271,15 @@ struct AnimationSettingsView: View {
             Text(String(format: "%.2f", damping.wrappedValue)).monospacedDigit().frame(width: 50)
         }
     }
+
+    @ViewBuilder
+    private func durationControl(duration: Binding<Double>) -> some View {
+        HStack {
+            Text("Duration")
+            Slider(value: duration, in: 0.05...1.5, step: 0.01)
+            Text(String(format: "%.2fs", duration.wrappedValue)).monospacedDigit().frame(width: 56)
+        }
+    }
 }
 
 // MARK: - Terminal