Type Index Pages
- BillboardGui
- CanvasGroup
- Frame
- Hint
- ImageButton
- ImageLabel
- PlayerGui
- ScreenGui
- ScrollingFrame
- StarterGui
- SurfaceGui
- TextBox
- TextButton
- TextLabel
- UIAspectRatioConstraint
- UIGradient
- UIGridLayout
- UIListLayout
- UIPadding
- UIPageLayout
- UIScale
- UISizeConstraint
- UITableLayout
- UITextSizeConstraint
- VideoFrame
- ViewportFrame
- ChangeHistoryService
- CoreGui
- DataModelSession
- DockWidgetPluginGui
- MultipleDocumentInterfaceInstance
- Plugin
- PluginAction
- PluginGui
- PluginGuiService
- PluginManager
- PluginMenu
- PluginMouse
- PluginToolbar
- PluginToolbarButton
- QWidgetPluginGui
- Selection
- StandalonePluginScripts
- StatsItem
- StudioService
- StudioTheme
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-
Instance
- GameSettings
- DebugSettings
- BodyMover
- WeldConstraint
- HttpRbxApiService
- NotificationService
- Translator
- Lighting
- Beam
- GuiService
- UserInputService
- Studio
- Plugin
- HttpService
- Mouse
- BindableEvent
- RunService
- Pages
- Humanoid
- TestService
- PathfindingService
- Chat
- NetworkPeer
- Feature
- CharacterAppearance
- Constraint
- NetworkReplicator
- JointInstance
- Light
- BasePlayerGui
- AnalyticsService
- NetworkMarker
- BinaryStringValue
- FlyweightService
- Geometry
- LoginService
- InstancePacketCache
- ThirdPartyUserService
- TouchInputService
- RuntimeScriptService
- GuidRegistryService
- PartOperationAsset
- DialogChoice
- PhysicsService
- AdService
- TextService
- MarketplaceService
- TeleportService
- Accoutrement
- GamePassService
- AssetService
- InsertService
- PointsService
- ChangeHistoryService
- ServerScriptService
- JointsService
- LogService
- InputObject
- Toolbar
- LuaSettings
- RenderSettings
- AnimationTrack
- PhysicsSettings
- NetworkSettings
- CFrameValue
- Animation
- Color3Value
- BoolValue
- BrickColorValue
- Vector3Value
- AnimationController
- BindableFunction
- Button
- Trail
- LocalizationTable
- LocalizationService
- DebuggerBreakpoint
- DebuggerWatch
- ScriptDebugger
- Animator
- Attachment
- RemoteFunction
- RemoteEvent
- PluginManager
- Camera
- Stats
- Sky
- StarterPlayer
- Dragger
- TerrainRegion
- Path
- TextFilterResult
- Dialog
- StatsItem
- GoogleAnalyticsConfiguration
- ScriptContext
- ControllerService
- CacheableContentProvider
- ReflectionMetadataClasses
- ReflectionMetadataEnums
- DebuggerManager
- GuiBase
- UIBase
- LuaSourceContainer
- GuiItem
- DataModelMesh
- ServiceProvider
- ReflectionMetadataItem
- PostEffect
- PhysicsPacketCache
- TouchTransmitter
- RobloxReplicatedStorage
- Visit
- LuaWebService
- ScriptService
- FlagStandService
- VirtualUser
- SpawnerService
- TimerService
- CookiesService
- Team
- GroupService
- StarterGear
- Message
- PlayerScripts
- Configuration
- ContentProvider
- CollectionService
- Debris
- ReplicatedFirst
- ServerStorage
- ReplicatedStorage
- Folder
- TweenService
- Players
- ContextActionService
- StarterPlayerScripts
- SoundService
- KeyframeSequenceProvider
- VRService
- PluginGuiService
- Player
- Teams
- Pose
- Keyframe
- KeyframeSequence
- IntConstrainedValue
- DoubleConstrainedValue
- ForceField
- RayValue
- Fire
- Smoke
- Sparkles
- ParticleEmitter
- IntValue
- StringValue
- NumberValue
- Explosion
- ObjectValue
- SoundGroup
- UserGameSettings
- ClickDetector
- Sound
- Selection
- BadgeService
- TaskScheduler
- GlobalDataStore
- DataStoreService
- CustomEvent
- CustomEventReceiver
- VirtualInputManager
- FunctionalTest
- TweenBase
- SoundEffect
- ReflectionMetadataEvents
- ClusterPacketCache
- PVInstance
- FaceInstance
- Controller
- ReflectionMetadataCallbacks
- ReflectionMetadataFunctions
- ReflectionMetadataYieldFunctions
- ReflectionMetadataProperties
- ReflectionMetadata
- AdvancedDragger
- HapticService
- FriendService
- GamepadService
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RootPriority
This property is the main rule in determining the root part of an assembly. It is an integer between -127 and 127 that takes precedence over all other rules for root part sort (including the weird rules based on part BasePart/Size|size
). A part with a higher RootPriority will take priority over other BasePart/Anchored|unanchored
parts with equal BasePart/Massless|Massless
values and a lower RootPriority.

Use this to control which part of an assembly is the root part and keep the root part stable if size changes.
See also
articles/understanding root parts|Understanding Root Parts
, an article documenting what root parts are and how to use them
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