There are several ways in which a window control can be used: normal window(, dialog or floating window
Normal Window
A normal window is docked to the desktop dashboard (e.g. layout designer), dialog or floating window
Normal Window (Docked)
Dialog Window
...
Dialog
A Dialog is a modal Window. While it is displayed, all other UI elements outside the modal window are inactive. You must close the modal Dialog to be able to access other parts of the UI
Floating Window
A floating window (also called a “Sticked” or “pinned” window) always stays in front, even if it does not have focus.
...