diff --git a/MVMCoreUI/Atomic/Molecules/NavigationBar/NavigationItemModel.swift b/MVMCoreUI/Atomic/Molecules/NavigationBar/NavigationItemModel.swift
index 67fc779f..07d8f760 100644
--- a/MVMCoreUI/Atomic/Molecules/NavigationBar/NavigationItemModel.swift
+++ b/MVMCoreUI/Atomic/Molecules/NavigationBar/NavigationItemModel.swift
@@ -20,16 +20,14 @@ open class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProtoc
     
     open class var identifier: String { "navigationBar" }
     public var id: String = UUID().uuidString
-    
-    private let defaultHidesSystemBackButton = true
-    
+        
     open var title: String?
-    open var hidden = false
-    open var line: LineModel? = LineModel(type: .secondary)
-    open var hidesSystemBackButton = true
+    open var hidden: Bool?
+    open var line: LineModel?
+    open var hidesSystemBackButton: Bool?
     open var style: NavigationItemStyle?
-
-    private var _backgroundColor: Color?
+    
+    open var _backgroundColor: Color?
     open var backgroundColor: Color? {
         get {
             if let backgroundColor = _backgroundColor { return backgroundColor }
@@ -41,8 +39,8 @@ open class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProtoc
             _backgroundColor = newValue
         }
     }
-
-    private var _tintColor: Color?
+    
+    open var _tintColor: Color?
     open var tintColor: Color {
         get {
             if let tintColor = _tintColor { return tintColor }
@@ -54,7 +52,6 @@ open class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProtoc
             _tintColor = newValue
         }
     }
-    
     /// If true, we add the button in the backButton property. If false we do not add the button. If nil, we add the button if the controller is not the bottom of the stack
     open var alwaysShowBackButton: Bool?
     open var backButton: (NavigationButtonModelProtocol & MoleculeModelProtocol)?
@@ -62,7 +59,7 @@ open class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProtoc
     open var additionalLeftButtons: [(NavigationButtonModelProtocol & MoleculeModelProtocol)]?
     open var additionalRightButtons: [(NavigationButtonModelProtocol & MoleculeModelProtocol)]?
     open var titleView: MoleculeModelProtocol?
-    open var titleOffset: UIOffset? = UIOffset(horizontal: -CGFloat.greatestFiniteMagnitude, vertical: 0)
+    open var titleOffset: UIOffset?
     
     //--------------------------------------------------
     // MARK: - Initializer
@@ -100,27 +97,18 @@ open class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProtoc
         let typeContainer = try decoder.container(keyedBy: CodingKeys.self)
         id = try typeContainer.decodeIfPresent(String.self, forKey: .id) ?? UUID().uuidString
         title = try typeContainer.decodeIfPresent(String.self, forKey: .title)
-        if let hidden = try typeContainer.decodeIfPresent(Bool.self, forKey: .hidden) {
-            self.hidden = hidden
-        }
+        hidden = try typeContainer.decodeIfPresent(Bool.self, forKey: .hidden)
         backgroundColor = try typeContainer.decodeIfPresent(Color.self, forKey: .backgroundColor)
         _tintColor = try typeContainer.decodeIfPresent(Color.self, forKey: .tintColor)
-        if let line = try typeContainer.decodeIfPresent(LineModel.self, forKey: .line) {
-            self.line = line
-        }
-        if let hidesSystemBackButton = try typeContainer.decodeIfPresent(Bool.self, forKey: .hidesSystemBackButton) {
-            self.hidesSystemBackButton = hidesSystemBackButton
-        }
+        line = try typeContainer.decodeIfPresent(LineModel.self, forKey: .line)
+        hidesSystemBackButton = try typeContainer.decodeIfPresent(Bool.self, forKey: .hidesSystemBackButton)
         alwaysShowBackButton = try typeContainer.decodeIfPresent(Bool.self, forKey: .alwaysShowBackButton)
         backButton = try typeContainer.decodeModelIfPresent(codingKey: .backButton)
         additionalLeftButtons = try typeContainer.decodeModelsIfPresent(codingKey: .additionalLeftButtons)
         additionalRightButtons = try typeContainer.decodeModelsIfPresent(codingKey: .additionalRightButtons)
         titleView = try typeContainer.decodeModelIfPresent(codingKey: .titleView)
         style = try typeContainer.decodeIfPresent(NavigationItemStyle.self, forKey: .style)
-        if let titleOffset = try typeContainer.decodeIfPresent(UIOffset.self, forKey: .titleOffset) {
-            self.titleOffset = titleOffset
-        }
-        line?.inverted = style == .dark
+        titleOffset = try typeContainer.decodeIfPresent(UIOffset.self, forKey: .titleOffset)
     }
               
     open func encode(to encoder: Encoder) throws {
@@ -128,11 +116,11 @@ open class NavigationItemModel: NavigationItemModelProtocol, MoleculeModelProtoc
         try container.encode(id, forKey: .id)
         try container.encode(moleculeName, forKey: .moleculeName)
         try container.encodeIfPresent(title, forKey: .title)
-        try container.encode(hidden, forKey: .hidden)
-        try container.encodeIfPresent(_backgroundColor, forKey: .backgroundColor)
+        try container.encodeIfPresent(hidden, forKey: .hidden)
+        try container.encodeIfPresent(backgroundColor, forKey: .backgroundColor)
         try container.encodeIfPresent(_tintColor, forKey: .tintColor)
         try container.encodeIfPresent(line, forKey: .line)
-        try container.encode(hidesSystemBackButton, forKey: .hidesSystemBackButton)
+        try container.encodeIfPresent(hidesSystemBackButton, forKey: .hidesSystemBackButton)
         try container.encodeIfPresent(alwaysShowBackButton, forKey: .alwaysShowBackButton)
         try container.encodeModelIfPresent(backButton, forKey: .backButton)
         try container.encodeModelsIfPresent(additionalLeftButtons, forKey: .additionalLeftButtons)
diff --git a/MVMCoreUI/Atomic/Protocols/ModelProtocols/NavigationItemModelProtocol.swift b/MVMCoreUI/Atomic/Protocols/ModelProtocols/NavigationItemModelProtocol.swift
index b9fb111a..3225483f 100644
--- a/MVMCoreUI/Atomic/Protocols/ModelProtocols/NavigationItemModelProtocol.swift
+++ b/MVMCoreUI/Atomic/Protocols/ModelProtocols/NavigationItemModelProtocol.swift
@@ -10,11 +10,11 @@ import Foundation
 
 public protocol NavigationItemModelProtocol {
     var title: String? { get set }
-    var hidden: Bool { get set }
+    var hidden: Bool? { get set }
     var backgroundColor: Color? { get set }
     var tintColor: Color { get set }
     var line: LineModel? { get set }
-    var hidesSystemBackButton: Bool { get set }
+    var hidesSystemBackButton: Bool? { get set }
     var alwaysShowBackButton: Bool? { get set }
     var backButton: (NavigationButtonModelProtocol & MoleculeModelProtocol)? { get set }
     var additionalLeftButtons: [(NavigationButtonModelProtocol & MoleculeModelProtocol)]? { get set }
diff --git a/MVMCoreUI/Containers/NavigationController/UINavigationController+Extension.swift b/MVMCoreUI/Containers/NavigationController/UINavigationController+Extension.swift
index 5a3d9a1a..16200422 100644
--- a/MVMCoreUI/Containers/NavigationController/UINavigationController+Extension.swift
+++ b/MVMCoreUI/Containers/NavigationController/UINavigationController+Extension.swift
@@ -23,8 +23,8 @@ public extension UINavigationController {
         
         viewController.navigationItem.title = model.title
         viewController.navigationItem.accessibilityLabel = model.title
-        viewController.navigationItem.hidesBackButton = model.hidesSystemBackButton
-        viewController.navigationItem.leftItemsSupplementBackButton = !model.hidesSystemBackButton
+        viewController.navigationItem.hidesBackButton = model.hidesSystemBackButton ?? true
+        viewController.navigationItem.leftItemsSupplementBackButton = !viewController.navigationItem.hidesBackButton
         setNavigationButtons(with: model, for: viewController)
         setNavigationTitleView(with: model, for: viewController, coordinatingWith: pageBehaviorController)
         
@@ -38,7 +38,7 @@ public extension UINavigationController {
     func setNavigationButtons(with model: NavigationItemModelProtocol, for viewController: UIViewController) {
         let delegate = (viewController as? MVMCoreViewControllerProtocol)?.delegateObject?() as? MVMCoreUIDelegateObject
         var leftItems: [UIBarButtonItem] = []
-        if model.hidesSystemBackButton,
+        if model.hidesSystemBackButton ?? true,
            model.alwaysShowBackButton != false {
             if let backButtonModel = model.backButton,
                NavigationHandler.shared().getViewControllers(for: self).count > 1 || model.alwaysShowBackButton ?? false {
@@ -102,7 +102,7 @@ public extension UINavigationController {
         navigationBar.standardAppearance = appearance
         navigationBar.scrollEdgeAppearance = appearance
         
-        setNavigationBarHidden(model.hidden, animated: false)
+        setNavigationBarHidden(model.hidden ?? false, animated: false)
     }
     
     @objc @MainActor
diff --git a/MVMCoreUI/Containers/SplitViewController/MVMCoreUISplitViewController+Extension.swift b/MVMCoreUI/Containers/SplitViewController/MVMCoreUISplitViewController+Extension.swift
index 549d53a8..11e33458 100644
--- a/MVMCoreUI/Containers/SplitViewController/MVMCoreUISplitViewController+Extension.swift
+++ b/MVMCoreUI/Containers/SplitViewController/MVMCoreUISplitViewController+Extension.swift
@@ -119,7 +119,7 @@ public extension MVMCoreUISplitViewController {
         let delegate = (viewController as? MVMCoreViewControllerProtocol)?.delegateObject?() as? MVMCoreUIDelegateObject
 
         // Add back button first.
-        if navigationItemModel?.hidesSystemBackButton == true {
+        if navigationItemModel?.hidesSystemBackButton ?? true {
             var showBackButton: Bool
             if let forceBackButton = navigationItemModel?.alwaysShowBackButton {
                 showBackButton = forceBackButton