Using The GIMP for Basic Photo Editing
Downloading images from your digital camera to your computer is only half the battle; once you've saved your images, you'll also probably want to improve them—to edit or fix color and contrast problems, to sharpen, lighten, or darken them, at the very least.
The GNU Image Manipulation Program (GIMP) is designed to do precisely this kind of heavy lifting in graphics work. To start The GIMP now, choose Applications, Graphics, The GIMP or right-click on the image that you want to edit in a file manager window and choose Open with “The GIMP” from the context menu that appears.
Because this is the first time you've started The GIMP, the GIMP User Installation dialog box appears, as shown in Figure 14.2. Click ...