Empty states are placeholder states when there is nothing to display in a window.
UIT
IMGUI
Errors and other types of alerts are used to communicate conditions, indicate an event, or show responses.
Inheritance describes when objects inherit or override values from child or parent objects.
Menus provide access points to contextual actions, items or windows.
Overlays are persistent and customizable panels and toolbars that are available in the Editor scene view.
Core guidance around scene tooling workflows.
Windows contain the content and functionality that let the user interact with the Editor.