OpenWindows User's Guide

Returning to the Desktop

If you have set the screensaver option and your screen turns blank, you can restore your desktop by moving the mouse in any direction. Although input from any keyboard key or mouse button will restore your screen, it is advised that you move the mouse instead. This is because pressing a key creates system input. This means, as an example, that if the pointer is positioned in a text file, you may insert a character in the text.