You can add attributes to your Component's properties in C# to change how they look in the editor/inspector.

`[Hide]`

Hides the property from the editor. Will still be a property, and will still save and load - but won't be visible.

`[RequireComponent]`

Added to a property containing a component. The component will be created if it doesn't exist.

`[Group( "Helpers" )]`

Will create a group box and add this property to that group. Mark multiple properties to add them to the same group.

`[ToggleGroup( "UseHelpers" )]`

A group that has a checkbox to turn it on and off. The name should match the name of a bool property to hold the state.

`[Title( "My New Title" )]`

Change the title of the property in editor, instead of using the property name.

`[Feature( "Helpers" )]`

Adds this property to a separate feature tab. All other properties will be in a tab called General.

`[FeatureEnabled( "Helpers" )]`

Should be used on a bool property. This allows you to turn the feature on and off by removing or adding the tab.

`[Order( 100 )]`

Change the order of this property in the editor. Their position in the source usually orders them.

`[ShowIf( "PropertyName", 3 )]`

Only show this property if another property is equal to the value.

`[HideIf( "PropertyName", 3 )]`

Hide this property if another property is equal to the value.

When used on a number property, the control widget will have a min and max value provided, with an optional argument to clamp the value (enabled by default, so the user cannot manually input a number outside of the range) and another to show a slider instead of a number field (enabled by default)

`[Step( 10 )]`

When used on a number property, the control widget will only increment by the step amount provided when clicked and dragged.

`[Space]`

Add a space above the property.

`[Header( "My Header" )]`

Add a header above the property.

`[ReadOnly]`

Don't allow changing this property.

`[Flags]`

Indicates that an enum can be treated as a set of flags. Allows for selecting multiple flags at once from the dropdown instead of just selecting one.

`[InlineEditor]`

Tell the editor to try to display inline editing for this property, rather than hiding it behind a popup. (useful for custom Classes/Structs)

`[WideMode]`

Fill the width of the editor with the widget and put the label above instead of to the left of the ControlWidget. Can optionally hide/remove the label entirely.

`[Validate( nameof( IsValid ), "Warning Message", LogLevel.Warn )]`

Specifies a method in the same class to use for validation. The validation result will be shown in the inspector.

`[Advanced]`

Some properties are not meant for the average user, hide the property unless the user really wants to see it.

`[KeyProperty]`

For use in custom Classes/Structs, marks the property as the key property - which means that it can represent the whole object in a single line while offering an advanced mode to view the entire object.

String-Specific

`[Placeholder( "Your mother's maiden name" )]`

When used on a string property, will show this text when it's empty.

`[TextArea]`

When used on a string property, show a multiline text area instead of a single-line text edit.

`[FilePath]`

When used on a string property, creates a File Picker allowing you to select any file, with an optional Extension you can use to specify certain file type(s).

`[ImageAssetPath]`

When used on a string property, creates a ResourceControlWidget allowing you to select an image file, setting the string's value to the path of the image.

`[MapAssetPath]`

When used on a string property, creates a ResourceControlWidget allowing you to select a vmap file, setting the string's value to the path of the map.

`[FontName]`

When used on a string property, creates a Font dropdown allowing you to easily select a font by it's name.

`[InputAction]`

When used on a string property, creates an Input dropdown comprised of all Inputs configured in your Project Settings, allowing you to easily select an Input by it's name.