I'm using a TMK firmware (ALPS64) and I've been experimenting a bit with oneshot keys, but I found that in the default firmware I can only use a single oneshot key at once. In other words, if I want to use a keyboard shortcut that is Ctrl-shift-cmd-X, I can't hit the Ctrl, shift, and cmd keys in succession and get the keyboard shortcut; it only recognizes the most recently hit oneshot key.
Can I configure TMK to use combinations of oneshot keys? I didn't see an option for this in the docs.