ScriptReference/EditorGUILayout.MaskField

[giscus[bot]]

ScriptReference/EditorGUILayout.MaskField

https://docs.unity3d.com/ScriptReference/EditorGUILayout.MaskField.html

[vertxxyz]

If you want your MaskField to look like a button you might think to pass GUIContent.none to label and use a relevant GUISkin. The MaskField will still draw text of its own, the way to fix this is to make your own GUIStyle with imagePosition set to ImagePostion.ImageOnly.

[mvi]

Nothing and Everything are options that Unity adds to your supplied options with special integer values:
0 = Nothing
-1 = Everything - note using int.MaxValue will not display as Everything, instead it will show Mixed with all values set