By using your favorite photographic software, you may manipulate your images which way you choose.

Here are some possibilities:

1. Simply put image(s) on the background.

2. Change the size of the background.

3. Change background color.

4. For intermediate or advance users,  you may modify your images by using any  image manipulation software such as Adobe Photoshop, Adobe Photo deluxe etc.  You may add text, add filter, drop shadows etc.  You are only limited by your imagination.