diff --git a/TheNoiseClock/ViewModels/ClockViewModel.swift b/TheNoiseClock/ViewModels/ClockViewModel.swift
index 748aa4f..5155fe1 100644
--- a/TheNoiseClock/ViewModels/ClockViewModel.swift
+++ b/TheNoiseClock/ViewModels/ClockViewModel.swift
@@ -86,7 +86,7 @@ class ClockViewModel {
         }
     }
     
-    private func saveStyle() {
+    func saveStyle() {
         persistenceWorkItem?.cancel()
         
         let work = DispatchWorkItem {
diff --git a/TheNoiseClock/Views/Clock/ClockView.swift b/TheNoiseClock/Views/Clock/ClockView.swift
index 22f1c5b..8d5565c 100644
--- a/TheNoiseClock/Views/Clock/ClockView.swift
+++ b/TheNoiseClock/Views/Clock/ClockView.swift
@@ -13,6 +13,7 @@ struct ClockView: View {
     // MARK: - Properties
     @State private var viewModel = ClockViewModel()
     @State private var showSettings = false
+    @State private var showFullScreenHint = false
     
     // MARK: - Body
     var body: some View {
@@ -31,6 +32,11 @@ struct ClockView: View {
                     
                     // Top overlay container
                     ClockOverlayContainer(style: viewModel.style)
+                    
+                    // Full screen hint overlay
+                    if showFullScreenHint {
+                        FullScreenHintView(isDisplayMode: viewModel.isDisplayMode)
+                    }
                 }
             }
         }
@@ -48,7 +54,19 @@ struct ClockView: View {
             // Toolbar overlay
             ClockToolbar(
                 isDisplayMode: viewModel.isDisplayMode,
-                onSettingsTap: { showSettings = true }
+                onSettingsTap: { showSettings = true },
+                onFullScreenTap: { 
+                    if !viewModel.isDisplayMode {
+                        viewModel.toggleDisplayMode()
+                        
+                        // Show hint after a brief delay to allow transition
+                        DispatchQueue.main.asyncAfter(deadline: .now() + 0.5) {
+                            showFullScreenHint = true
+                        }
+                    } else {
+                        viewModel.toggleDisplayMode()
+                    }
+                }
             )
         }
         .overlay {
diff --git a/TheNoiseClock/Views/Clock/Components/ClockToolbar.swift b/TheNoiseClock/Views/Clock/Components/ClockToolbar.swift
index fa14680..cc8f024 100644
--- a/TheNoiseClock/Views/Clock/Components/ClockToolbar.swift
+++ b/TheNoiseClock/Views/Clock/Components/ClockToolbar.swift
@@ -13,6 +13,7 @@ struct ClockToolbar: View {
     // MARK: - Properties
     let isDisplayMode: Bool
     let onSettingsTap: () -> Void
+    let onFullScreenTap: () -> Void
     
     // MARK: - Body
     var body: some View {
@@ -20,7 +21,16 @@ struct ClockToolbar: View {
             .navigationTitle(isDisplayMode ? "" : "Clock")
             .toolbar {
                 if !isDisplayMode {
-                    ToolbarItem(placement: .navigationBarTrailing) {
+                    ToolbarItemGroup(placement: .navigationBarTrailing) {
+                        Button {
+                            onFullScreenTap()
+                        } label: {
+                            Image(systemName: "rectangle.expand.diagonal")
+                                .font(.title2)
+                                .transition(.opacity)
+                        }
+                        .accessibilityLabel("Enter Full Screen Mode")
+                        
                         Button {
                             onSettingsTap()
                         } label: {
@@ -28,6 +38,7 @@ struct ClockToolbar: View {
                                 .font(.title2)
                                 .transition(.opacity)
                         }
+                        .accessibilityLabel("Clock Settings")
                     }
                 }
             }
@@ -41,7 +52,8 @@ struct ClockToolbar: View {
     NavigationStack {
         ClockToolbar(
             isDisplayMode: false,
-            onSettingsTap: {}
+            onSettingsTap: {},
+            onFullScreenTap: {}
         )
     }
 }
diff --git a/TheNoiseClock/Views/Clock/Components/FullScreenHintView.swift b/TheNoiseClock/Views/Clock/Components/FullScreenHintView.swift
new file mode 100644
index 0000000..372e41a
--- /dev/null
+++ b/TheNoiseClock/Views/Clock/Components/FullScreenHintView.swift
@@ -0,0 +1,73 @@
+//
+//  FullScreenHintView.swift
+//  TheNoiseClock
+//
+//  Created by Matt Bruce on 9/10/25.
+//
+
+import SwiftUI
+
+/// Component that shows a subtle hint for how to exit full-screen mode
+struct FullScreenHintView: View {
+    
+    // MARK: - Properties
+    let isDisplayMode: Bool
+    @State private var hintOpacity: Double = 0.0
+    
+    // MARK: - Body
+    var body: some View {
+        if isDisplayMode {
+            VStack {
+                Spacer()
+                
+                HStack {
+                    Image(systemName: "hand.point.up.left")
+                        .font(.title2)
+                        .foregroundColor(.white.opacity(0.7))
+                    
+                    Text("Long press to exit full screen")
+                        .font(.headline)
+                        .foregroundColor(.white.opacity(0.7))
+                    
+                    Image(systemName: "hand.point.up.left")
+                        .font(.title2)
+                        .foregroundColor(.white.opacity(0.7))
+                }
+                .padding(.horizontal, 20)
+                .padding(.vertical, 12)
+                .background(
+                    RoundedRectangle(cornerRadius: 20)
+                        .fill(.black.opacity(0.6))
+                        .blur(radius: 1)
+                )
+                .opacity(hintOpacity)
+                
+                Spacer()
+                    .frame(height: 100) // Space above tab bar area
+            }
+            .transition(.opacity.combined(with: .scale(scale: 0.9)))
+            .onAppear {
+                withAnimation(.easeInOut(duration: 0.5)) {
+                    hintOpacity = 1.0
+                }
+                
+                // Auto-hide after 3 seconds
+                DispatchQueue.main.asyncAfter(deadline: .now() + 3.0) {
+                    withAnimation(.easeInOut(duration: 0.5)) {
+                        hintOpacity = 0.0
+                    }
+                }
+            }
+        }
+    }
+    
+}
+
+// MARK: - Preview
+#Preview {
+    ZStack {
+        Color.black.ignoresSafeArea()
+        
+        FullScreenHintView(isDisplayMode: true)
+    }
+}