What do you mean? As in, you only want the screenshot to be on one side of the screen? Well unfortunutly, since your choosing to use paint and the print screen key your going to just have to crop it in paint,but if you use a dedicated screenshot program, then you can get a screenshot of just the game. I beleive most games have a dedicated function so you can look there, or else there is another program called fraps, the free version lets you get screenshots...if I remember correctly.