A (short answer): If you are running the emulation under
Windows you can press Alt+F4 to exit or Alt+Tab to switch to
another program, or press F12 and change the emulation Display
settings to change between full screen and windowed mode.
A (long answer): The Amiga Workbench screen is a graphical
front-end which gives you access to disks and files, and where
system tools and other applications can open windows. This is the
Amiga equivalent of the Windows Desktop. Programs like Directory
Opus can completely replace the Amiga Workbench.
If you close the Workbench, and unless you have a Workbench
replacement or another program running on its own screen, you end
up with a blank screen, and no way to use the Amiga operating
system. As strange
as it may sound, the Amiga Workbench includes a Quit command,
which does exactly what it says: it closes the Workbench
front-end. This command does not shut down the Amiga (or, in the
emulation, quit the emulation).
If you selected the Quit command on purpose (intending to close
the Workbench, rather than quitting the emulation) and saw a
message like "Cannot Quit yet, there are 3 WB launched program(s)",
this usually refers to the programs which were launched at startup
("System/WBStartup" directory) You can press Ctrl+Alt+F1 to open
Commodities Exchange and quit these programs.
If you are reading this page you probably intended to exit the
emulation. Under Windows you can press Alt+Tab to cycle from and
to the emulation to and from other applications, or Alt+F4 to quit
the emulation. These are standard Windows shortcuts, valid for
most applications. When the emulation is running in windowed mode
you can also click the window close button to exit the emulation.
On all operating systems, WinUAE may be terminated by opening
UAE-Control (the icon at the bottom right of the screen, when
booting the 3.X configuration) and selecting Quit UAE.