Framemaker uses <$filename> for short file name, can we edit this to change appearance? We do not want the short file name of long filename to include the .fm extension can this be removed or modified to make this happen?

Framemaker uses <$filename> for short file name, can we edit this to change appearance? We do not want the short file name of long filename to include the .fm extension can this be removed or modified to make this happen? In compiling our books it would be helpful to not have this extension appear as it then requires us to create extra files without them.