photo previews
 

How i set the 4 photo in box photo previews instead 5 ?

Thanks

If you are referring to the featured photos on the photopost index you control how many rows and photos show in Admin => Layout Options. Top two options there columns and number of photos to show are set there.

There is no setting to control how many show there it is usually 5

You can only turn off the next/prev photo displays in Admin => Show Photo Options.

In some file php the number of photograph is written us to visualize?

Not sure what your trying to say there. You can modify your files as you see fit. The showphoto.php file is the file that has the code.