To display your image in a Web browser, you must save your image as a .GIF or a .JPG. If you are not sure which to Save as, check to see if your image matches one of the descriptions in the left hand column:
If your image... Save it as * uses only a few colours .GIF * has large blocks of continuous colour * is a simple line drawing * uses many colours (ie: 16 million) .JPG * looks like a photograph * is larger than 60K when saved as a .GIF
(tips on minimizing file size)