Screeen type specific action

Screeen type specific action

Hi,
I`d like to know if its posible some configuration at a Screen Type Specific Action on a Report Viewer screen.
I have a button to export an Excel/PDF file out of the report printed out on the screen, here is all good, but, this function creates a file uniquely with the NAME of the report, nor a variable neither a name I could somehow choose. Is there a way I could configure this function to set the name of the exported file from a variable, a pop up configuration screen or static? 
I have four different reports for my process and way too many cicles of each one to have a non editable naming report.

Thank you!