orderBack:

Removes the window from the screen list, which hides the window.

Moves the window to the front of its level in the screen list, without changing either the key window or the main window.

Moves the window to the front of its level, even if its application isn’t active, without changing either the key window or the main window.

Repositions the window’s window device in the window server’s screen list.

The window level of the window.

The standard window levels in macOS.

Moves the window to the front of the screen list, within its level, and makes it the key window; that is, it shows the window.