UTIL Command M - Message margin

This command is used to alter the right margin on messages that you enter.
This will affect all of your messages.  The margin can be set between 8 and
72 (72 is the default) by simply entering the desired column number when
prompted to do so.

TIPS:
1.  Use the M)argin command from the editing subfunctions command line to
    change the right margin for just the current message being entered.
    The editor is accessed while entering a message.

