Ok This is a very simple instructable that i will have great detail with. This is mainly for the NEWBS TO The INTERWEBZ. But if you dont know how it will be very simple. Oh this will NOT work for moving images, only stills.
Step 1: Find the 1 Key
This part is simple. Just click the PrtScn SysRq button on the screen you are on , or the image you want.
Step 2: What to Do With the Still
Ok now open paint then click the Paste button. Then your saved image should appear on the edit and past thingymajigger.
Step 3: Now That Wasnt to Hard Was It
Easy just edit it and save DONE. If you have a question just post a comment i will tell you what to do.