Click on "3"... this is for your commander postion... "2" ... Gunner... "1" ... Driver.
Then click on "D"... this will give you a designated driver.
Then click on "A"... this is to shift up through the gears. "Z"... will down shift.
"H"... will open your commander's hatch and driver's hatch.
"F1"... will put you in the commanders seat... and "Shift/F1" will open your commander's viewing scope, gunner's scope and driver's seat.
"F2"... will give you an outside view.
"R"... reload.
Hope this helps you out some... just yell if you do need more help.