[OS X TeX] Adding menu item and shortcut to TeXShop

[Kirk Lowery]

I've been trying to add XeLaTeX to the Typeset menu item in TeXShop. I
modified KeyEquivalents.plist but apparently it only will modify the
short cut for an already existing menu item. Or is
KeyEquivalents.plist the right way to do this and I'm doing it wrong?

So, to start with, is it possible to add a menu item to TeXShop's default menus?

Kirk