If you're talking about a menu you create on the menu bar, no. I mean, it
is possible for you as the end user to change it, but not you as the
programmer to change someone else's.
If I create a custom menu item can I change just the font
for eg. arial to timesnew roman all of the menu items or
any single menu item.. for this workbook only, i mean not
by changing thru control panel
Go to the object browse and select the object library for office, which is
where the commandbar object hierarchy is located.
Search for font.
If you find a font object related to a commandbar object, then you can use
that. I didn't see any, so my conclusion would be that you can not with
any built in settings.