diff --git a/org.mixedrealitytoolkit.core/CHANGELOG.md b/org.mixedrealitytoolkit.core/CHANGELOG.md
index f58f6423b..0bc7ca7c2 100644
--- a/org.mixedrealitytoolkit.core/CHANGELOG.md
+++ b/org.mixedrealitytoolkit.core/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## Unreleased
+
+### Added
+
+* Added new `editorDefault` field for debugging the various `DisplayType`s in-editor. [PR #1130](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1130)
+
 ## [4.0.0-pre.3] - 2026-05-20
 
 ### Added
diff --git a/org.mixedrealitytoolkit.core/Camera/CameraSettingsManager.cs b/org.mixedrealitytoolkit.core/Camera/CameraSettingsManager.cs
index a4b0d5c90..24d650372 100644
--- a/org.mixedrealitytoolkit.core/Camera/CameraSettingsManager.cs
+++ b/org.mixedrealitytoolkit.core/Camera/CameraSettingsManager.cs
@@ -12,7 +12,10 @@ namespace MixedReality.Toolkit
     [AddComponentMenu("MRTK/Core/Camera Settings Manager")]
     public class CameraSettingsManager : MonoBehaviour
     {
-        [SerializeField]
+        [SerializeField, Tooltip("The default display type in the editor.")]
+        private DisplayType editorDefault = DisplayType.Transparent;
+
+        [SerializeField, Tooltip("The settings to apply when the display is opaque (VR).")]
         private CameraSettings opaqueDisplay = new CameraSettings(DisplayType.Opaque);
 
         /// <summary>
@@ -24,7 +27,7 @@ public CameraSettings OpaqueDisplay
             set => opaqueDisplay = value;
         }
 
-        [SerializeField]
+        [SerializeField, Tooltip("The settings to apply when the display is transparent (AR).")]
         private CameraSettings transparentDisplay = new CameraSettings(DisplayType.Transparent);
 
         /// <summary>
@@ -81,7 +84,7 @@ private void UpdateCameraSettings(DisplayType type)
         {
             using (UpdateCameraSettingsPerfMarker.Auto())
             {
-                UnityEngine.Camera mainCamera = Camera.main;
+                Camera mainCamera = Camera.main;
 
                 switch (type)
                 {
@@ -133,7 +136,7 @@ private DisplayType GetDisplayType()
         {
             using (GetDisplayTypePerfMarker.Auto())
             {
-                if (XRSubsystemHelpers.DisplaySubsystem == null) { return DisplayType.Unknown; }
+                if (XRSubsystemHelpers.DisplaySubsystem == null) { return Application.isEditor ? editorDefault : DisplayType.Unknown; }
                 return XRSubsystemHelpers.DisplaySubsystem.displayOpaque ? DisplayType.Opaque : DisplayType.Transparent;
             }
         }
diff --git a/org.mixedrealitytoolkit.core/package.json b/org.mixedrealitytoolkit.core/package.json
index 7e450af30..4cb20d897 100644
--- a/org.mixedrealitytoolkit.core/package.json
+++ b/org.mixedrealitytoolkit.core/package.json
@@ -1,6 +1,6 @@
 {
   "name": "org.mixedrealitytoolkit.core",
-  "version": "4.0.0-development.pre.3",
+  "version": "4.0.0-development.pre.4",
   "description": "A limited collection of common interfaces and utilities that most MRTK packages share. Most implementations of these interfaces are contained in other packages in the MRTK ecosystem.",
   "displayName": "MRTK Core Definitions",
   "msftFeatureCategory": "MRTK3",
diff --git a/org.mixedrealitytoolkit.input/Assets/Prefabs/MRTK XR Rig.prefab b/org.mixedrealitytoolkit.input/Assets/Prefabs/MRTK XR Rig.prefab
index c5f034143..e3a8ad08e 100644
--- a/org.mixedrealitytoolkit.input/Assets/Prefabs/MRTK XR Rig.prefab	
+++ b/org.mixedrealitytoolkit.input/Assets/Prefabs/MRTK XR Rig.prefab	
@@ -14,6 +14,8 @@ GameObject:
   - component: {fileID: 2351505566771328560}
   - component: {fileID: 2351505566771328561}
   - component: {fileID: 404949538145338360}
+  - component: {fileID: 2036977346182542242}
+  - component: {fileID: 9155035745778857788}
   m_Layer: 0
   m_Name: Main Camera
   m_TagString: MainCamera
@@ -28,13 +30,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 2351505566771328562}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 2351505566903569412}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!20 &2351505566771328527
 Camera:
@@ -50,9 +52,17 @@ Camera:
   m_projectionMatrixMode: 1
   m_GateFitMode: 2
   m_FOVAxisMode: 0
+  m_Iso: 200
+  m_ShutterSpeed: 0.005
+  m_Aperture: 16
+  m_FocusDistance: 10
+  m_FocalLength: 50
+  m_BladeCount: 5
+  m_Curvature: {x: 2, y: 11}
+  m_BarrelClipping: 0.25
+  m_Anamorphism: 0
   m_SensorSize: {x: 36, y: 24}
   m_LensShift: {x: 0, y: 0}
-  m_FocalLength: 50
   m_NormalizedViewPortRect:
     serializedVersion: 2
     x: 0
@@ -232,6 +242,7 @@ MonoBehaviour:
   m_Script: {fileID: 11500000, guid: 80bee04b0b615324e81420c8aac0dc47, type: 3}
   m_Name: 
   m_EditorClassIdentifier: 
+  editorDefault: 1
   opaqueDisplay:
     clearMode: 1
     clearColor: {r: 0, g: 0, b: 0, a: 0}
@@ -246,6 +257,38 @@ MonoBehaviour:
     farPlaneDistance: 50
     adjustQualityLevel: 1
     qualityLevel: 0
+--- !u!45 &2036977346182542242
+Skybox:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 2351505566771328562}
+  m_Enabled: 1
+  m_CustomSkybox: {fileID: 0}
+--- !u!114 &9155035745778857788
+MonoBehaviour:
+  m_ObjectHideFlags: 0
+  m_CorrespondingSourceObject: {fileID: 0}
+  m_PrefabInstance: {fileID: 0}
+  m_PrefabAsset: {fileID: 0}
+  m_GameObject: {fileID: 2351505566771328562}
+  m_Enabled: 1
+  m_EditorHideFlags: 0
+  m_Script: {fileID: 11500000, guid: 699100ca886480c4a94ced56b1ae0e94, type: 3}
+  m_Name: 
+  m_EditorClassIdentifier: 
+  themeDataSource: {fileID: 11400000, guid: 57993c46ea42acf4ca3067542443bc45, type: 2}
+  binders:
+  - rid: 8397413447246282960
+  references:
+    version: 2
+    RefIds:
+    - rid: 8397413447246282960
+      type: {class: SkyboxMaterialBinder, ns: MixedReality.Toolkit.Theming, asm: MixedReality.Toolkit.Theming}
+      data:
+        <Target>k__BackingField: {fileID: 2036977346182542242}
+        <ThemeDefinitionItemName>k__BackingField: Skybox
 --- !u!1 &2351505566903569413
 GameObject:
   m_ObjectHideFlags: 0
@@ -271,6 +314,7 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 2351505566903569413}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 1.6, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
@@ -281,7 +325,6 @@ Transform:
   - {fileID: 5769779419222680683}
   - {fileID: 7294214612838230064}
   m_Father: {fileID: 2351505567455720332}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!114 &3712792914886690938
 MonoBehaviour:
@@ -338,6 +381,7 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 2351505567455720334}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
@@ -348,7 +392,6 @@ Transform:
   - {fileID: 1074856417076994631}
   - {fileID: 6448619845270702420}
   m_Father: {fileID: 0}
-  m_RootOrder: 0
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!114 &4160709927669568829
 MonoBehaviour:
@@ -416,13 +459,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 7735890427496681069}
+  serializedVersion: 2
   m_LocalRotation: {x: -0, y: -0, z: -0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 2351505567455720332}
-  m_RootOrder: 3
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!114 &8085333164323593313
 MonoBehaviour:
@@ -500,13 +543,13 @@ Transform:
   m_PrefabInstance: {fileID: 0}
   m_PrefabAsset: {fileID: 0}
   m_GameObject: {fileID: 8479077998186684813}
+  serializedVersion: 2
   m_LocalRotation: {x: 0, y: 0, z: 0, w: 1}
   m_LocalPosition: {x: 0, y: 0, z: 0}
   m_LocalScale: {x: 1, y: 1, z: 1}
   m_ConstrainProportionsScale: 0
   m_Children: []
   m_Father: {fileID: 2351505567455720332}
-  m_RootOrder: 1
   m_LocalEulerAnglesHint: {x: 0, y: 0, z: 0}
 --- !u!114 &7720573869748407015
 MonoBehaviour:
@@ -549,6 +592,7 @@ PrefabInstance:
   m_ObjectHideFlags: 0
   serializedVersion: 2
   m_Modification:
+    serializedVersion: 3
     m_TransformParent: {fileID: 2351505566903569412}
     m_Modifications:
     - target: {fileID: 3021976565802998075, guid: d8a2a1f4b4f78754c86045f7a36fe424, type: 3}
@@ -567,14 +611,6 @@ PrefabInstance:
       propertyPath: m_ActivateInput.m_InputActionReferencePerformed
       value: 
       objectReference: {fileID: 0}
-    - target: {fileID: 6058071957502615222, guid: d8a2a1f4b4f78754c86045f7a36fe424, type: 3}
-      propertyPath: m_UpdateType
-      value: 0
-      objectReference: {fileID: 0}
-    - target: {fileID: 6853218870844938225, guid: d8a2a1f4b4f78754c86045f7a36fe424, type: 3}
-      propertyPath: m_RootOrder
-      value: 1
-      objectReference: {fileID: 0}
     - target: {fileID: 6853218870844938225, guid: d8a2a1f4b4f78754c86045f7a36fe424, type: 3}
       propertyPath: m_LocalPosition.x
       value: 0
@@ -620,6 +656,9 @@ PrefabInstance:
       value: MRTK Gaze Controller
       objectReference: {fileID: 0}
     m_RemovedComponents: []
+    m_RemovedGameObjects: []
+    m_AddedGameObjects: []
+    m_AddedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: d8a2a1f4b4f78754c86045f7a36fe424, type: 3}
 --- !u!114 &529201713281613631 stripped
 MonoBehaviour:
@@ -653,12 +692,9 @@ PrefabInstance:
   m_ObjectHideFlags: 0
   serializedVersion: 2
   m_Modification:
+    serializedVersion: 3
     m_TransformParent: {fileID: 2351505566903569412}
     m_Modifications:
-    - target: {fileID: 445577537456690332, guid: 2e5b90c191b94004182e55a48f0ca427, type: 3}
-      propertyPath: m_RootOrder
-      value: 2
-      objectReference: {fileID: 0}
     - target: {fileID: 445577537456690332, guid: 2e5b90c191b94004182e55a48f0ca427, type: 3}
       propertyPath: m_LocalPosition.x
       value: 0
@@ -708,6 +744,9 @@ PrefabInstance:
       value: 
       objectReference: {fileID: 529201713281613631}
     m_RemovedComponents: []
+    m_RemovedGameObjects: []
+    m_AddedGameObjects: []
+    m_AddedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: 2e5b90c191b94004182e55a48f0ca427, type: 3}
 --- !u!4 &5769779419222680683 stripped
 Transform:
@@ -730,6 +769,7 @@ PrefabInstance:
   m_ObjectHideFlags: 0
   serializedVersion: 2
   m_Modification:
+    serializedVersion: 3
     m_TransformParent: {fileID: 2351505567455720332}
     m_Modifications:
     - target: {fileID: 919676360596656614, guid: 02502921f64c38d48b14f1d6c2438b16, type: 3}
@@ -748,10 +788,6 @@ PrefabInstance:
       propertyPath: m_Name
       value: MRTK Interaction Manager
       objectReference: {fileID: 0}
-    - target: {fileID: 7821592117992173402, guid: 02502921f64c38d48b14f1d6c2438b16, type: 3}
-      propertyPath: m_RootOrder
-      value: 2
-      objectReference: {fileID: 0}
     - target: {fileID: 7821592117992173402, guid: 02502921f64c38d48b14f1d6c2438b16, type: 3}
       propertyPath: m_LocalPosition.x
       value: 0
@@ -793,6 +829,9 @@ PrefabInstance:
       value: 0
       objectReference: {fileID: 0}
     m_RemovedComponents: []
+    m_RemovedGameObjects: []
+    m_AddedGameObjects: []
+    m_AddedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: 02502921f64c38d48b14f1d6c2438b16, type: 3}
 --- !u!114 &800708247703322884 stripped
 MonoBehaviour:
@@ -815,16 +854,13 @@ PrefabInstance:
   m_ObjectHideFlags: 0
   serializedVersion: 2
   m_Modification:
+    serializedVersion: 3
     m_TransformParent: {fileID: 2351505566903569412}
     m_Modifications:
     - target: {fileID: 1948193615953854874, guid: 90f955d6c9d709448a0b1e29e1f9c046, type: 3}
       propertyPath: m_Name
       value: MRTK LeftHand Controller
       objectReference: {fileID: 0}
-    - target: {fileID: 1948193615953854875, guid: 90f955d6c9d709448a0b1e29e1f9c046, type: 3}
-      propertyPath: m_RootOrder
-      value: 3
-      objectReference: {fileID: 0}
     - target: {fileID: 1948193615953854875, guid: 90f955d6c9d709448a0b1e29e1f9c046, type: 3}
       propertyPath: m_LocalPosition.x
       value: 0
@@ -874,6 +910,9 @@ PrefabInstance:
       value: 
       objectReference: {fileID: 529201713281613631}
     m_RemovedComponents: []
+    m_RemovedGameObjects: []
+    m_AddedGameObjects: []
+    m_AddedComponents: []
   m_SourcePrefab: {fileID: 100100000, guid: 90f955d6c9d709448a0b1e29e1f9c046, type: 3}
 --- !u!114 &6032659918864907508 stripped
 MonoBehaviour:
diff --git a/org.mixedrealitytoolkit.input/CHANGELOG.md b/org.mixedrealitytoolkit.input/CHANGELOG.md
index 1254dcd0f..da60bd152 100644
--- a/org.mixedrealitytoolkit.input/CHANGELOG.md
+++ b/org.mixedrealitytoolkit.input/CHANGELOG.md
@@ -15,6 +15,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 * Added `MRTKFocusFeature` to provide XrSession focus info to MRTK components. [PR #1057](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1057)
 * Added input action focus handling to disable controller/hand tracked state when the XrSession goes out of focus. [PR #1057](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1057)
 * Added support for XR_MSFT_hand_tracking_mesh and XR_ANDROID_hand_mesh on compatible runtimes. [PR #993](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/993)
+* Added `Skybox` component to "MRTK XR Rig.prefab" for theming the skybox material. [PR #1130](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1130)
 
 ### Changed
 
diff --git a/org.mixedrealitytoolkit.theming/Binders/BaseThemeBinder.cs b/org.mixedrealitytoolkit.theming/Binders/BaseThemeBinder.cs
index f36683211..4f80c710b 100644
--- a/org.mixedrealitytoolkit.theming/Binders/BaseThemeBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/BaseThemeBinder.cs
@@ -6,16 +6,31 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Base class for a theme binder that binds a theme data value of type <typeparamref name="T"/> to a target component of type <typeparamref name="K"/>.
+    /// </summary>
     public abstract class BaseThemeBinder<T, K> : IBinder
     {
+        /// <summary>
+        /// The target component to apply the theme data to.
+        /// </summary>
         [field: SerializeField]
         protected K Target { get; private set; }
 
+        /// <inheritdoc />
         [field: SerializeField, HideInInspector]
         public string ThemeDefinitionItemName { get; private set; }
 
+        /// <summary>
+        /// Applies the theme data value to the target component.
+        /// </summary>
+        /// <param name="themeItemData">The theme data to apply.</param>
         protected abstract void Apply(BaseThemeItemData<T> themeItemData);
 
+        /// <summary>
+        /// Invoked when the active theme is changed on the data source.
+        /// </summary>
+        /// <param name="changeEvent">The change event containing the new theme.</param>
         protected void OnThemeChanged(ChangeEvent<Theme> changeEvent)
         {
             if (changeEvent.newValue == null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/BehaviourEnabledBinder.cs b/org.mixedrealitytoolkit.theming/Binders/BehaviourEnabledBinder.cs
new file mode 100644
index 000000000..a4221c91f
--- /dev/null
+++ b/org.mixedrealitytoolkit.theming/Binders/BehaviourEnabledBinder.cs
@@ -0,0 +1,23 @@
+// Copyright (c) Mixed Reality Toolkit Contributors
+// Licensed under the BSD 3-Clause
+
+using UnityEngine;
+
+namespace MixedReality.Toolkit.Theming
+{
+    /// <summary>
+    /// Binds a boolean theme data value to the enabled state of a <see cref="UnityEngine.Behaviour"/>.
+    /// </summary>
+    [System.Serializable]
+    public class BehaviourEnabledBinder : BaseThemeBinder<bool, Behaviour>
+    {
+        /// <inheritdoc />
+        protected override void Apply(BaseThemeItemData<bool> themeItemData)
+        {
+            if (Target != null)
+            {
+                Target.enabled = themeItemData.Value;
+            }
+        }
+    }
+}
diff --git a/org.mixedrealitytoolkit.theming/Binders/BehaviourEnabledBinder.cs.meta b/org.mixedrealitytoolkit.theming/Binders/BehaviourEnabledBinder.cs.meta
new file mode 100644
index 000000000..e456b5a66
--- /dev/null
+++ b/org.mixedrealitytoolkit.theming/Binders/BehaviourEnabledBinder.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: e360db02646a69842969f67dd0c46e9b
\ No newline at end of file
diff --git a/org.mixedrealitytoolkit.theming/Binders/FontIconSetBinder.cs b/org.mixedrealitytoolkit.theming/Binders/FontIconSetBinder.cs
index db211806f..f93229968 100644
--- a/org.mixedrealitytoolkit.theming/Binders/FontIconSetBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/FontIconSetBinder.cs
@@ -8,9 +8,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a font icon set theme data value to a <see cref="FontIconSetBinding"/>.
+    /// </summary>
     [Serializable]
     public class FontIconSetBinder : BaseThemeBinder<FontIconSetBinder.FontIconSetData, FontIconSetBinder.FontIconSetBinding>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<FontIconSetData> themeItemData)
         {
             if (Target != null &&
@@ -28,22 +32,40 @@ protected override void Apply(BaseThemeItemData<FontIconSetData> themeItemData)
             }
         }
 
+        /// <summary>
+        /// A composite binding target for a <see cref="FontIconSelector"/> and a <see cref="TMP_Text"/> component.
+        /// </summary>
         [Serializable]
         public class FontIconSetBinding
         {
+            /// <summary>
+            /// The target icon selector component to apply the font icon set to.
+            /// </summary>
             [field: SerializeField]
             public FontIconSelector IconSelector { get; private set; }
 
+            /// <summary>
+            /// The target text mesh pro component to apply the font asset to.
+            /// </summary>
             [field: SerializeField]
             public TMP_Text TextMeshProComponent { get; private set; }
         }
 
+        /// <summary>
+        /// A composite data type containing a <see cref="TMP_FontAsset"/> and a <see cref="MixedReality.Toolkit.UX.FontIconSet"/>.
+        /// </summary>
         [Serializable]
         public class FontIconSetData
         {
+            /// <summary>
+            /// The font asset to apply to the text mesh pro component.
+            /// </summary>
             [field: SerializeField]
             public TMP_FontAsset Font { get; private set; }
 
+            /// <summary>
+            /// The font icon set to apply to the icon selector component.
+            /// </summary>
             [field: SerializeField]
             public FontIconSet FontIconSet { get; private set; }
         }
diff --git a/org.mixedrealitytoolkit.theming/Binders/GraphicColorBinder.cs b/org.mixedrealitytoolkit.theming/Binders/GraphicColorBinder.cs
index 50a290082..d92d615e9 100644
--- a/org.mixedrealitytoolkit.theming/Binders/GraphicColorBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/GraphicColorBinder.cs
@@ -6,9 +6,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a color theme data value to the color property of a <see cref="UnityEngine.UI.Graphic"/>.
+    /// </summary>
     [System.Serializable]
     public class GraphicColorBinder : BaseThemeBinder<Color, Graphic>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<Color> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/GraphicMaterialBinder.cs b/org.mixedrealitytoolkit.theming/Binders/GraphicMaterialBinder.cs
index 66b77fc41..96af3af55 100644
--- a/org.mixedrealitytoolkit.theming/Binders/GraphicMaterialBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/GraphicMaterialBinder.cs
@@ -6,9 +6,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a material theme data value to the material property of a <see cref="UnityEngine.UI.Graphic"/>.
+    /// </summary>
     [System.Serializable]
     public class GraphicMaterialBinder : BaseThemeBinder<Material, Graphic>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<Material> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/IBinder.cs b/org.mixedrealitytoolkit.theming/Binders/IBinder.cs
index dd64ad902..e1ac52d7d 100644
--- a/org.mixedrealitytoolkit.theming/Binders/IBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/IBinder.cs
@@ -3,11 +3,26 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Interface for a theme binder that subscribes to a <see cref="ThemeDataSource"/> and applies theme data to a target.
+    /// </summary>
     public interface IBinder
     {
+        /// <summary>
+        /// Subscribes to the given theme data source for theme changes.
+        /// </summary>
+        /// <param name="themeDataSource">The theme data source to subscribe to.</param>
         void Subscribe(ThemeDataSource themeDataSource);
+
+        /// <summary>
+        /// Unsubscribes from the given theme data source.
+        /// </summary>
+        /// <param name="themeDataSource">The theme data source to unsubscribe from.</param>
         void Unsubscribe(ThemeDataSource themeDataSource);
 
+        /// <summary>
+        /// The name of the theme definition item this binder targets.
+        /// </summary>
         string ThemeDefinitionItemName { get; }
     }
 }
diff --git a/org.mixedrealitytoolkit.theming/Binders/ImageSpriteBinder.cs b/org.mixedrealitytoolkit.theming/Binders/ImageSpriteBinder.cs
index a02e8cd81..c72379ae1 100644
--- a/org.mixedrealitytoolkit.theming/Binders/ImageSpriteBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/ImageSpriteBinder.cs
@@ -6,9 +6,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a sprite theme data value to the sprite property of a <see cref="UnityEngine.UI.Image"/>.
+    /// </summary>
     [System.Serializable]
     public class ImageSpriteBinder : BaseThemeBinder<Sprite, Image>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<Sprite> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/LayoutGroupPaddingBinder.cs b/org.mixedrealitytoolkit.theming/Binders/LayoutGroupPaddingBinder.cs
index c2c5ce61a..a714bc9a5 100644
--- a/org.mixedrealitytoolkit.theming/Binders/LayoutGroupPaddingBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/LayoutGroupPaddingBinder.cs
@@ -6,9 +6,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a rect offset theme data value to the padding property of a <see cref="UnityEngine.UI.HorizontalOrVerticalLayoutGroup"/>.
+    /// </summary>
     [System.Serializable]
     public class LayoutGroupPaddingBinder : BaseThemeBinder<RectOffset, HorizontalOrVerticalLayoutGroup>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<RectOffset> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/RendererMaterialBinder.cs b/org.mixedrealitytoolkit.theming/Binders/RendererMaterialBinder.cs
index 0850970bc..5dccbe78f 100644
--- a/org.mixedrealitytoolkit.theming/Binders/RendererMaterialBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/RendererMaterialBinder.cs
@@ -5,9 +5,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a material theme data value to the material property of a <see cref="UnityEngine.Renderer"/>.
+    /// </summary>
     [System.Serializable]
     public class RendererMaterialBinder : BaseThemeBinder<Material, Renderer>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<Material> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/RoundedRectMask2DRadiusBinder.cs b/org.mixedrealitytoolkit.theming/Binders/RoundedRectMask2DRadiusBinder.cs
index 21388e483..7f8fbb414 100644
--- a/org.mixedrealitytoolkit.theming/Binders/RoundedRectMask2DRadiusBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/RoundedRectMask2DRadiusBinder.cs
@@ -6,9 +6,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a float theme data value to the corner radii property of a <see cref="Microsoft.MixedReality.GraphicsTools.RoundedRectMask2D"/>.
+    /// </summary>
     [System.Serializable]
     public class RoundedRectMask2DRadiusBinder : BaseThemeBinder<float, RoundedRectMask2D>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<float> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/SkyboxMaterialBinder.cs b/org.mixedrealitytoolkit.theming/Binders/SkyboxMaterialBinder.cs
new file mode 100644
index 000000000..0efef5429
--- /dev/null
+++ b/org.mixedrealitytoolkit.theming/Binders/SkyboxMaterialBinder.cs
@@ -0,0 +1,23 @@
+// Copyright (c) Mixed Reality Toolkit Contributors
+// Licensed under the BSD 3-Clause
+
+using UnityEngine;
+
+namespace MixedReality.Toolkit.Theming
+{
+    /// <summary>
+    /// Binds a material theme data value to the material property of a <see cref="UnityEngine.Skybox"/>.
+    /// </summary>
+    [System.Serializable]
+    public class SkyboxMaterialBinder : BaseThemeBinder<Material, Skybox>
+    {
+        /// <inheritdoc />
+        protected override void Apply(BaseThemeItemData<Material> themeItemData)
+        {
+            if (Target != null)
+            {
+                Target.material = themeItemData.Value;
+            }
+        }
+    }
+}
diff --git a/org.mixedrealitytoolkit.theming/Binders/SkyboxMaterialBinder.cs.meta b/org.mixedrealitytoolkit.theming/Binders/SkyboxMaterialBinder.cs.meta
new file mode 100644
index 000000000..2a5595525
--- /dev/null
+++ b/org.mixedrealitytoolkit.theming/Binders/SkyboxMaterialBinder.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 5970cbf205f8c324bb5e3f76a5cad6a0
\ No newline at end of file
diff --git a/org.mixedrealitytoolkit.theming/Binders/SpriteRendererColorBinder.cs b/org.mixedrealitytoolkit.theming/Binders/SpriteRendererColorBinder.cs
index 24b1ccc51..fb9a79086 100644
--- a/org.mixedrealitytoolkit.theming/Binders/SpriteRendererColorBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/SpriteRendererColorBinder.cs
@@ -5,9 +5,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a color theme data value to the color property of a <see cref="UnityEngine.SpriteRenderer"/>.
+    /// </summary>
     [System.Serializable]
     public class SpriteRendererColorBinder : BaseThemeBinder<Color, SpriteRenderer>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<Color> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/SpriteRendererSpriteBinder.cs b/org.mixedrealitytoolkit.theming/Binders/SpriteRendererSpriteBinder.cs
index bfbe24a0c..cb0ed154b 100644
--- a/org.mixedrealitytoolkit.theming/Binders/SpriteRendererSpriteBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/SpriteRendererSpriteBinder.cs
@@ -5,9 +5,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a sprite theme data value to the sprite property of a <see cref="UnityEngine.SpriteRenderer"/>.
+    /// </summary>
     [System.Serializable]
     public class SpriteRendererSpriteBinder : BaseThemeBinder<Sprite, SpriteRenderer>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<Sprite> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/TMP_TextFontAssetBinder.cs b/org.mixedrealitytoolkit.theming/Binders/TMP_TextFontAssetBinder.cs
index dd86cb292..3f5f2f345 100644
--- a/org.mixedrealitytoolkit.theming/Binders/TMP_TextFontAssetBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/TMP_TextFontAssetBinder.cs
@@ -5,9 +5,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a font asset theme data value to the font property of a <see cref="TMPro.TMP_Text"/>.
+    /// </summary>
     [System.Serializable]
     public class TMP_TextFontAssetBinder : BaseThemeBinder<TMP_FontAsset, TMP_Text>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<TMP_FontAsset> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/Binders/TransformLocalScaleBinder.cs b/org.mixedrealitytoolkit.theming/Binders/TransformLocalScaleBinder.cs
index 0baf4905a..88ebe0f8a 100644
--- a/org.mixedrealitytoolkit.theming/Binders/TransformLocalScaleBinder.cs
+++ b/org.mixedrealitytoolkit.theming/Binders/TransformLocalScaleBinder.cs
@@ -5,9 +5,13 @@
 
 namespace MixedReality.Toolkit.Theming
 {
+    /// <summary>
+    /// Binds a vector3 theme data value to the local scale property of a <see cref="UnityEngine.Transform"/>.
+    /// </summary>
     [System.Serializable]
     public class TransformLocalScaleBinder : BaseThemeBinder<Vector3, Transform>
     {
+        /// <inheritdoc />
         protected override void Apply(BaseThemeItemData<Vector3> themeItemData)
         {
             if (Target != null)
diff --git a/org.mixedrealitytoolkit.theming/CHANGELOG.md b/org.mixedrealitytoolkit.theming/CHANGELOG.md
index ff4a26279..52880eb4c 100644
--- a/org.mixedrealitytoolkit.theming/CHANGELOG.md
+++ b/org.mixedrealitytoolkit.theming/CHANGELOG.md
@@ -2,6 +2,13 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## Unreleased
+
+### Added
+
+* Added serializable theme item data types for booleans. [PR #1130](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1130)
+* Added built-in binders for skybox materials and behaviour enabled states. [PR #1130](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1130)
+
 ## [1.0.0-pre.1] - 2026-05-20
 
 ### Added
diff --git a/org.mixedrealitytoolkit.theming/Editor/ThemeDefinitionEditor.cs.meta b/org.mixedrealitytoolkit.theming/Editor/ThemeDefinitionEditor.cs.meta
index 252cb02a7..94b14e254 100644
--- a/org.mixedrealitytoolkit.theming/Editor/ThemeDefinitionEditor.cs.meta
+++ b/org.mixedrealitytoolkit.theming/Editor/ThemeDefinitionEditor.cs.meta
@@ -1,2 +1,11 @@
 fileFormatVersion: 2
-guid: bd66f2c84c6572b48a8ed4194a8bc818
\ No newline at end of file
+guid: bd66f2c84c6572b48a8ed4194a8bc818
+MonoImporter:
+  externalObjects: {}
+  serializedVersion: 2
+  defaultReferences: []
+  executionOrder: 0
+  icon: {instanceID: 0}
+  userData: 
+  assetBundleName: 
+  assetBundleVariant: 
diff --git a/org.mixedrealitytoolkit.theming/ItemData/BoolItemData.cs b/org.mixedrealitytoolkit.theming/ItemData/BoolItemData.cs
new file mode 100644
index 000000000..7a2fb0b5c
--- /dev/null
+++ b/org.mixedrealitytoolkit.theming/ItemData/BoolItemData.cs
@@ -0,0 +1,8 @@
+// Copyright (c) Mixed Reality Toolkit Contributors
+// Licensed under the BSD 3-Clause
+
+namespace MixedReality.Toolkit.Theming
+{
+    [System.Serializable]
+    public class BoolItemData : BaseThemeItemData<bool> { }
+}
diff --git a/org.mixedrealitytoolkit.theming/ItemData/BoolItemData.cs.meta b/org.mixedrealitytoolkit.theming/ItemData/BoolItemData.cs.meta
new file mode 100644
index 000000000..3848b6cc7
--- /dev/null
+++ b/org.mixedrealitytoolkit.theming/ItemData/BoolItemData.cs.meta
@@ -0,0 +1,2 @@
+fileFormatVersion: 2
+guid: 6eef238277b82de42820e22d387ab78a
\ No newline at end of file
diff --git a/org.mixedrealitytoolkit.theming/README.md b/org.mixedrealitytoolkit.theming/README.md
index 58b69ce18..e4884ca00 100644
--- a/org.mixedrealitytoolkit.theming/README.md
+++ b/org.mixedrealitytoolkit.theming/README.md
@@ -92,7 +92,9 @@ When the active theme changes, the binder looks up its named item in the new the
 | `TransformLocalScaleBinder` | `Vector3` | `Transform` | `Transform.localScale` |
 | `LayoutGroupPaddingBinder` | `RectOffset` | `HorizontalOrVerticalLayoutGroup` | Padding |
 | `RoundedRectMask2DRadiusBinder` | `float` | `RoundedRectMask2D` | Corner radius |
-| `FontIconSetBinder` | `FontIconSetData` | — | Font + icon set |
+| `FontIconSetBinder` | `FontIconSetData` | `FontIconSetBinding` | Font + icon set |
+| `BehaviourEnabledBinder` | `bool` | `Behaviour` | `Behaviour.enabled` |
+| `SkyboxMaterialBinder` | `Material` | `Skybox` | `Skybox.material` |
 | `StateVisualizerEffectColorBinder` | `Color` | `StateVisualizer` | Tint effect color per state |
 
 ---
diff --git a/org.mixedrealitytoolkit.theming/Theming/MRTK_Theming_DefaultDefinition.asset b/org.mixedrealitytoolkit.theming/Theming/MRTK_Theming_DefaultDefinition.asset
index 115e45c6d..c69554af0 100644
--- a/org.mixedrealitytoolkit.theming/Theming/MRTK_Theming_DefaultDefinition.asset
+++ b/org.mixedrealitytoolkit.theming/Theming/MRTK_Theming_DefaultDefinition.asset
@@ -94,3 +94,12 @@ MonoBehaviour:
   - <Name>k__BackingField: Surface Container Color
     <DataType>k__BackingField:
       reference: MixedReality.Toolkit.Theming.ColorThemeItemData, MixedReality.Toolkit.Theming
+  - <Name>k__BackingField: Skybox
+    <DataType>k__BackingField:
+      reference: MixedReality.Toolkit.Theming.MaterialThemeItemData, MixedReality.Toolkit.Theming
+  - <Name>k__BackingField: Enable Shared List Backplate
+    <DataType>k__BackingField:
+      reference: MixedReality.Toolkit.Theming.BoolItemData, MixedReality.Toolkit.Theming
+  - <Name>k__BackingField: Enable Button Select Pulse
+    <DataType>k__BackingField:
+      reference: MixedReality.Toolkit.Theming.BoolItemData, MixedReality.Toolkit.Theming
diff --git a/org.mixedrealitytoolkit.theming/package.json b/org.mixedrealitytoolkit.theming/package.json
index e804a9e08..0ee19c34c 100644
--- a/org.mixedrealitytoolkit.theming/package.json
+++ b/org.mixedrealitytoolkit.theming/package.json
@@ -1,6 +1,6 @@
 {
   "name": "org.mixedrealitytoolkit.theming",
-  "version": "1.0.0-development.pre.1",
+  "version": "1.0.0-development.pre.2",
   "description": "Core theming scripts for building MR UI components. Intended to be consumed when building UX libraries. For pre-existing library of components, see the UX Components package.",
   "displayName": "MRTK UX Theming",
   "author": "Mixed Reality Toolkit Contributors",
diff --git a/org.mixedrealitytoolkit.uxcomponents/Button/Prefabs/Empty Button.prefab b/org.mixedrealitytoolkit.uxcomponents/Button/Prefabs/Empty Button.prefab
index b990a9ddd..194530161 100644
--- a/org.mixedrealitytoolkit.uxcomponents/Button/Prefabs/Empty Button.prefab	
+++ b/org.mixedrealitytoolkit.uxcomponents/Button/Prefabs/Empty Button.prefab	
@@ -1019,6 +1019,7 @@ MonoBehaviour:
   binders:
   - rid: 1538473242837123161
   - rid: 1538473242837123160
+  - rid: 8397413649693540611
   references:
     version: 2
     RefIds:
@@ -1032,6 +1033,11 @@ MonoBehaviour:
       data:
         <Target>k__BackingField: {fileID: 9026472854072389792}
         <ThemeDefinitionItemName>k__BackingField: Canvas Backplate Quad Material
+    - rid: 8397413649693540611
+      type: {class: BehaviourEnabledBinder, ns: MixedReality.Toolkit.Theming, asm: MixedReality.Toolkit.Theming}
+      data:
+        <Target>k__BackingField: {fileID: 7976009683108370513}
+        <ThemeDefinitionItemName>k__BackingField: Enable Button Select Pulse
 --- !u!1 &9026472854072389795
 GameObject:
   m_ObjectHideFlags: 0
diff --git a/org.mixedrealitytoolkit.uxcomponents/CHANGELOG.md b/org.mixedrealitytoolkit.uxcomponents/CHANGELOG.md
index b1d8ccc78..b9f98602e 100644
--- a/org.mixedrealitytoolkit.uxcomponents/CHANGELOG.md
+++ b/org.mixedrealitytoolkit.uxcomponents/CHANGELOG.md
@@ -2,6 +2,12 @@
 
 The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.1.0/).
 
+## Unreleased
+
+### Added
+
+* Added "Enable Button Select Pulse" binding to "Empty Button.prefab". [PR #1130](https://github.com/MixedRealityToolkit/MixedRealityToolkit-Unity/pull/1130)
+
 ## [4.0.0-pre.3] - 2026-05-20
 
 ### Changed
diff --git a/org.mixedrealitytoolkit.uxcomponents/package.json b/org.mixedrealitytoolkit.uxcomponents/package.json
index 45c8af2ac..bfe9eaca4 100644
--- a/org.mixedrealitytoolkit.uxcomponents/package.json
+++ b/org.mixedrealitytoolkit.uxcomponents/package.json
@@ -1,6 +1,6 @@
 {
   "name": "org.mixedrealitytoolkit.uxcomponents",
-  "version": "4.0.0-development.pre.3",
+  "version": "4.0.0-development.pre.4",
   "description": "UX library leveraging RectTransform and Canvas for dynamic layout and presentation. Contains prefabs, visuals, controls, and everything to get started building 3D user interfaces for mixed reality.",
   "displayName": "MRTK UX Components",
   "msftFeatureCategory": "MRTK3",