To log-out, just close the program like any other Windows™ program. The simplest way is just to press Alt-F4. This is the standard Windows close keyboard short-cut, or you can press the X in the top right corner of the desktop, or select the Exit item from the File menu. In all cases, you will be asked to confirm the close:

Press No to allow the close to proceed.

There are some system actions that will force you to be logged-out. In such cases, you will see this confirm dialog pop-up and the Reason line will describe why you are being logged off. A typical reason would be if the system were being upgraded to a newer version from some other workstation.

Any screens and menus you have open on your desktop when you log-out will be re-opened in the same place and at the same size the next time you log-in on the same station.