to illustrate capturing only the ACTIVE window using ALT+PrintScreen keys
to explain how to PASTE screen captures into word processing documents
to show how to EXPORT as a PDF
If you are having trouble making clean screen shots, you may need to hold down two keys at a time - for most PC users, the ALT + PrintScreen key combination will only place the ACTIVE window onto your clipboard. Once your window is properly sized, using this key combination will result in nicely sized screen shots.
You may have a different key combination on your PC - experiment until you figure out which one work for you.
This video gives you a simple way to capture screen shots and paste them into an Open Office document - but the method can be applied to almost any application that you want to paste a graphic into.