Hopping around

Task switching XE "task switching" is a principal objective of Windows. Here are some handy ways to move between functions:

Between programs when several are running: Hold down the Alt key. Tap the Tab key without releasing Alt. A little box will announce the name of another program. If you release Alt then, you get that program. If you tap Tab again, you get a third program. When you see the one you want, release Alt.

Between windows in one program: Control-Tab switches between windows. This is especially handy if one window completely covers another.

Clicking on any part of a window always jumps to that window. This fact is applicable unless the window is completely covered.