primary
The behavior marking this window as primary for both Stage Manager and full screen.
Declaration
static var primary: NSWindow.CollectionBehavior { get }Discussion
Marking a window collection behavior as primary means it becomes primary for both Stage Manager and full screen display modes.
To set a different behavior in full screen while keeping Stage Manager primary, set a more specific behavior just for full screen mode (see fullScreenAuxiliary).
Use this collection behavior for document or viewer windows.