you press the alt on the right side then on the number pad you press 0191 or you press alt+168 on the number pad on a mac you do shift and option and question mark at the same time (¿)
You can do it, it's actually possible. I haven't used Mac computer, so I'm not 100% sure...You have to type the following:Opt + shift + ?Hope it helps. For more info, visit this...