On your computer, with GIMP you can emphasize pictures in colorful ways. You can make red rectangle or ellipse to focus your readers to a point in a picture. Of course you can use blue, green, orange, and other colors too. It is easy to do once you know how. I present you here a new video again followed by short explanations, an example, and exercises. Lastly, don't forget that this tutorial is a part of GIMP Guide for Author. Happy editing!