Make sure the image selected has been converted to a bitmap, then either go to Bitmaps>Auto Adjust (to get a recommended image alteration instantly) or to Bitmaps>Image Adjustment Lab. Once in the Lab, select the split window option at the top (in order to show a before and after of any changes you make to the image). In the Lab you will be able to adjust the temperature, tint, saturation, brightness, contrast, highlights, shadows, and mid-tones. Keep in mind that any changes made can easily be undone with the Undo (CTRL+Z) shortcut.
—JDS Industries
