I am trying to search on how to chat using the hand signals such as saluting; but I keep finding results on text chat and how it doesn't exist or voice chat.
It tells me to use the [?] key. What the hell is the [?] key?!?!?! I hit the question mark, but nothing happens, even with Shift. What should I do?
Best Answer
You are looking for the Coop menu button. It is bound to 'V' by default. The binding can be changed by going to 'Keyboard and Mouse' (or Controller I suppose), then 'Customize controls' in the options.
Once you are in a co-op game it is used to bring up the coop action menu, as seen here.