I want to add capabilities to my program to provide users to change report definitions (moving fields, add text, paper format, changing fonts) from within a program.

With
set reso off
modi repo xx
set reso on

I succeed to preview report control toolbar to user and with #bar _mfi_pgset in menu user can change paper format.

I don't know how to provide change field font in some band from within a program?

Thanks in advance.