>I'm new to this site.

Welcome

>Most of these reports can't be shown on the screen because the size is too small and not even superman can read the report's contents on the screen.
>¿¿ is there a way to increase the 100% on the print preview..??

Not that I know of. Are you running Window NT Workstation 4. There is a problem with VFP3/5 and the print preview on NT4. With other configuration the print size is readable.