Color gradients are a nice way of giving an elements depth and drawing visitors in. Particularly on buttons, gradients make elements look clickable.
  1. Click on the element which you wish to apply a gradient to
  2. Click the button labelled Style on the tools palette 
  3. Select the color you wish to become a gradient, typically this will be the background color
  4. At the bottom of the color selector window click Gradient
  5. Choose either from the pre defined gradients or click Customize Gradient to define custom colours