Since the UPPER layout is meant to help typing in
CONSTANT_IDENTIFIERS_LIKE_THIS, and meta syntactic variables LIKE-THIS (mostly
in Emacs Lisp docstrings), it’s important to have the ‘-’ and ‘_’ easily
accessible on the layer.
This layer is layed out so that when using a colemak keymap it turns into a
mirrored QWERTY, with the WASD mirrored a second time. This is so that I don’t
have to keep rebinding all of my keyboard keys when playing games and can use my
left-handed mouse.