Optional Window List Keys The keys that may optionally be available inside a window’s information dictionary. TopicsConstantskCGWindowWorkspacekCGWindowOwnerNamekCGWindowNamekCGWindowIsOnscreenkCGWindowBackingLocationVideoMemory See AlsoConstantsWindow Sharing ConstantsBacking Store TypesWindow List Option ConstantsWindow Image TypesCGWindowID Encoding TypeNull WindowWindow Sharing Encoding TypeWindow Backing Encoding TypeRequired Window List Keys