Hi Bernd,

Hitting '-' will cause Guide to filter out smaller cities. Use it often
enough, and all cities will vanish. Hitting '+' will reverse this effect.

"... I only want to display the MPC stations..."

Be warned that the list provided on the Guide CDs is quite outdated.
Download this file to your Guide folder:

http://www.projectpluto.com/mpc_stat.dat

and you'll be "current".

-- Bill