RelativePath UPROPERTY(meta=(RelativePath)) Docs: Used by FDirectoryPath properties. Indicates that the directory dialog will output a relative path when setting the property. https://unreal-garden.com/docs/uproperty/#relativepath #UnrealEngine

Categories UPROPERTY(meta=(Categories="abc")) "This allows you to limit which gameplaytags are allowed to be chosen for a `FGameplayTag` property. Multiple tags can be specified with commas separating them. Can also be used on `UPARAM` to limit the Gameplay Tags allowed on a `UFUNCTION()` There

UseComponentPicker UPROPERTY(meta=(UseComponentPicker)) "Use with `FComponentReference` properties. Only works on components attached to actor instances in levels. Does *not* work when editing a Blueprint subclass." https://unreal-garden.com/docs/uproperty/#usecomponentpicker #UnrealEngine

AllowAnyActor UPROPERTY(meta=(AllowAnyActor)) Docs: Used for ComponentReference properties. Indicates whether other actor that are not in the property outer hierarchy should be shown in the component picker. https://unreal-garden.com/docs/uproperty/#allowanyactor #UnrealEngine

DisallowCreateNew UPROPERTY(meta=(DisallowCreateNew)) "On any property that points to a class (e.g. `TSubclassOf<T>`, `UClass*`, `FSoftClassPath`), this causes the "Create New" plus button to be hidden." https://unreal-garden.com/docs/uproperty/#disallowcreatenew #UnrealEngine

OnlyPlaceable UPROPERTY(meta=(OnlyPlaceable)) Docs: Used for Subclass properties. Indicates whether only placeable classes should be shown in the class picker. https://unreal-garden.com/docs/uproperty/#onlyplaceable #UnrealEngine

ExactClass UPROPERTY(meta=(ExactClass)) Docs: Used for `FSoftObjectPath` properties in conjunction with AllowedClasses. Indicates whether only the exact classes specified in AllowedClasses can be used or whether subclasses are valid. https://unreal-garden.com/docs/uproperty/#exactclass #UnrealEngine

BlueprintBaseOnly UPROPERTY(meta=(BlueprintBaseOnly)) Docs: Used for Subclass and SoftClass properties. Indicates whether only blueprint classes should be shown in the class picker. https://unreal-garden.com/docs/uproperty/#blueprintbaseonly #UnrealEngine

ShowTreeView UPROPERTY(meta=(ShowTreeView)) Docs: Used for Subclass and SoftClass properties. Shows the picker as a tree view instead of as a list https://unreal-garden.com/docs/uproperty/#showtreeview #UnrealEngine

MustImplement UPROPERTY(meta=(MustImplement="abc")) Docs: Used for Subclass and SoftClass properties. Indicates the selected class must implement a specific interface https://unreal-garden.com/docs/uproperty/#mustimplement #UnrealEngine

AllowAbstract UPROPERTY(meta=(AllowAbstract)) "By default class pickers do not include abstract classes in their list of options. This changes that behaviour to include them. Could be useful when being able to instantiate the specified class is not

AllowedClasses UPROPERTY(meta=(AllowedClasses="abc")) "Not sure how this is different to MetaClass. Note that the string must *not* contain prefixes, so "Actor" is correct, "AActor" is incorrect. This *does* work with

MetaClass UPROPERTY(meta=(MetaClass="abc")) "Some datatypes like `FSoftClassPath` and `FSoftObjectPath` are not templated and allow any class type. `MetaClass` lets users allow only certain classes. In comparison `TSoftClassPtr` and `TSoftObjectPtr` use template parameters instead of

BlueprintCompilerGeneratedDefaults UPROPERTY(meta=(BlueprintCompilerGeneratedDefaults)) Docs: Property defaults are generated by the Blueprint compiler and will not be copied when CopyPropertiesForUnrelatedObjects is called

ConsoleVariable UPROPERTY(meta=(ConsoleVariable="abc")) "Exposes a variable to the developer console (accessible through the tilde key `~`). Heavily used in developer settings." https://unreal-garden.com/docs/uproperty/#consolevariable #UnrealEngine

RowType UPROPERTY(meta=(RowType="abc")) "Only allows selecting a data table row with a specific type." https://unreal-garden.com/docs/uproperty/#rowtype #UnrealEngine

RequiredAssetDataTags UPROPERTY(meta=(RequiredAssetDataTags="abc")) "Only shows data table assets with the specified row structure class. Note that previously the format was "RowStructure=ImageRow", but as of Unreal 5 you have to specify the full path to the class, as in

DataTableImportOptional UPROPERTY(meta=(DataTableImportOptional=true)) "When importing data to fill out a data table, by default all columns are required to exist in the CSV file. If an column does not exist in the CSV, an error is shown (see screenshot). By marking a property with

DesignerRebuild UPROPERTY(meta=(DesignerRebuild)) "If you have a property that affects the appearance of your widget, and you want your widget appearance to refresh whenever it is changed, add `DesignerRebuild`." https://unreal-garden.com/docs/uproperty/#designerrebuild #UnrealEngine

BindWidgetAnimOptional UPROPERTY(meta=(BindWidgetAnimOptional)) "The same as `BindWidgetAnim` but no error is thrown when the animation does not exist in the User Widget blueprint" https://unreal-garden.com/docs/uproperty/#bindwidgetanimoptional #UnrealEngine

BindWidgetAnim UPROPERTY(meta=(BindWidgetAnim)) "Allows C++ code to call widget animations defined in a child User Widget Blueprint. The name of the animation must match the variable. See `UWidgetBlueprintGeneratedClass::BindAnimations` for more of the juicy

BindWidgetOptional UPROPERTY(meta=(BindWidgetOptional)) "When a `BindWidget`-specified widget is not found, an error is thrown on compilation. When a `BindWidgetOptional`-specified widget is not found, only an information-level log entry is displayed. Use it for widgets that your User Widget does

BindWidget UPROPERTY(meta=(BindWidget)) "Allows C++ code to access `UWidget` variables defined in `UUserWidget` Blueprint. If that makes no sense, (https://benui.ca/unreal/ui-bindwidget/) Technically what happens is widgets within the UserWidget Blueprint's widget tree are bound to matching

ReplicatedUsing UPROPERTY(ReplicatedUsing="abc") "Requires definition of the same `GetLifetimeReplicatedProps` function described in (replicated). There are technically three different valid signatures for the `UFUNCTION`, shown in the 3 code samples

NotReplicated UPROPERTY(NotReplicated) "Can be useful to on properties within structs where part should be replicated and others should not (see the example below)." https://unreal-garden.com/docs/uproperty/#notreplicated #UnrealEngine

Replicated UPROPERTY(Replicated) "Replication and multiplayer in general is a massive topic but some quick poitns: Marking a property as `Replicated` is not enough on its own. In the `.cpp` you also need to define a `GetLifetimeReplicatedProps` function (see

ExposeOnSpawn UPROPERTY(meta=(ExposeOnSpawn=true)) "When using `SpawnActor` or `Construct Object` from Blueprints, marking a property with `ExposeOnSpawn` will cause it to be shown in the same node. Useful for variables you often want to set up when creating an Actor or Object. You must mark

MakeStructureDefaultValue UPROPERTY(meta=(MakeStructureDefaultValue="abc")) "There's only one example of this in the codebase, inside `NoExportTypes.h`. Not sure how this is different from just doing a C11-style `FVector Scale3D =

DisallowedClasses UPROPERTY(meta=(DisallowedClasses="abc")) Docs: Used in conjunction with DeprecatedNode, DeprecatedProperty, or DeprecatedFunction to customize the warning message displayed to the user. https://unreal-garden.com/docs/uproperty/#disallowedclasses #UnrealEngine

DeprecationMessage UPROPERTY(meta=(DeprecationMessage="abc")) "See (deprecatedproperty)" https://unreal-garden.com/docs/uproperty/#deprecationmessage #UnrealEngine