Completed Dark/Light Mode

ProjectClock/Base.lproj/Main.storyboard

@@ -279,6 +279,9 @@
                         </constraints>
                     </view>
                     <tabBarItem key="tabBarItem" title="Debug" image="hammer.fill" catalog="system" selectedImage="hammer.fill" id="QZ2-fJ-hLg"/>
+                    <connections>
+                        <outlet property="userModeButton" destination="Zrg-H8-O73" id="9sz-f3-9pJ"/>
+                    </connections>
                 </viewController>
                 <placeholder placeholderIdentifier="IBFirstResponder" id="mZu-oh-Lmb" userLabel="First Responder" customClass="UIResponder" sceneMemberID="firstResponder"/>
             </objects>

ProjectClock/DebugViewController.swift

@@ -10,6 +10,9 @@ import UserNotifications
 
 class DebugViewController: UIViewController
 {
+    @IBOutlet weak var userModeButton: UIButton!
+    var darkMode = false
+    
     override func viewDidLoad()
     {
         super.viewDidLoad()
@@ -45,6 +48,14 @@ class DebugViewController: UIViewController
     }
     
     @IBAction func switchViewingMode(_ sender: Any) {
-        view.window?.overrideUserInterfaceStyle = .dark
+        if !darkMode {
+            view.window?.overrideUserInterfaceStyle = .dark
+            userModeButton.setTitle("Switch to Light Mode", for: .normal)
+            darkMode = true
+        } else {
+            view.window?.overrideUserInterfaceStyle = .light
+            userModeButton.setTitle("Switch to Dark Mode", for: .normal)
+            darkMode = false
+        }
     }
 }