As far as I can tell, there's no way to adjust my keybinds or options like screen resolution and the like without actually being in a game. The options screen that you get from opening the launcher options only allows you to adjust the volume, help tooltips, etc. I can't adjust the advanced settings without being inside of a game.
I don't want to join one and then sit there futzing with options while my team is busy. Is there some sort of hidden settings button in the launcher...somewhere... that I'm missing? Is it possible to open a sort of dummy-game without penalty just to mess with my settings? Or am I stuck trying to adjust these on the fly in AI/PvP games?