I figured out how to navigate throught files that have a related field, but I can't fiend how to make a button that would allowed me to go from the present reccord to the first reccord of any other file, related or not.

Thanks

Run a script in the other file, or use Go To Related Record.

If you need to investigate this concern in depth then visit the Jonathan Stars' site at www.TheFileMakerPro.com and take a look, under the section ARTICLES, to the 'ADDING BACK AND AHEAD BUTTONS'in which he implements a Back Track Logging file technique: very valuable !!

Regards.