right now, thumb keys are mapped to space/tab and backspace/enter. It's a tempting prospect, but I'm hard-pressed to sub-out any of those for modifiers. Maybe

right now, thumb keys are mapped to space/tab and backspace/enter. It's a tempting prospect, but I'm hard-pressed to sub-out any of those for modifiers. Maybe I can make it "hold enter" or something like that, but that seems like a dangerous prospect