Welcome geek 
The other problem you may have is aspect ration…
once you do the print screen you will want to crop the image to remove any of the browser window that you may not want to display. When you crop you are going to want to make the width and height the same…
as when you resize it will put the aspect ratio out of wack and the image will look out of shape.
See examples.
Hope this helps,
Roo