Capturing screens as images using PrintScreen?

[ejonathan]

How do I have a fixation point never leave the screen while I present words and shapes around it. I tried using the powerpoint --> bitmap technique to show the picture, but because the screenshot covers the entire screen, it covers up the fixation point that I have on the screen when it presents the picture. So what I did was capture a fixation point and the object as an entire picture...but there's a presentation delay and a slight movement of the fixation point by doing this. If you have a solution to this, please
let me know.