Best format for screen shots?

[SimPLsol at aol.com]

Tom,
Thank you for the advice.
I have never worked with png files. I understand that they are like a "super 
GIF", similar format, more colors. Do you know if pngs are bitmaps? I would 
like a format that scales well.
So far, for everyone following this thread, the most important thing I've 
learned is: keep the images full sized, if possible. Reducing the screenshots to 
75% caused more problems than using any of the formats I've tried.
Paul Looney