Total noob. First time poster. I looked around and didn’t see this elsewhere, so thought I would post in case it might help anybody else. My son actually discovered it by accident, and I was totally thrilled he did.
In the sim’s flight training for landing you are prompted to use a keyboard “F8” for lowering the flaps. This is particularly awkward if you are in VR and can’t actually see the keyboard without a “flashlight on” (and I have not yet activated voice controls). While the sim is generally spot on with instructing what buttons to use on the joystick when using a Logitech Extreme 3D Pro, this direction to “F8” on the keyboard seemed odd. And, well, it is.
My son mistakenly hit the joystick’s “9” button once when he was feeling for the trim buttons. Guess what? It lowered the flaps! The “10” button raises 'em. Nice!
So if you have a Logitech Extreme 3D Pro you can quit groping for the “F8” key on the keyboard. Just use the joystick buttons. Happy landings! (OK, OK, not all of mine have ended happily so far. Just sayin’. But I’m getting better! (And glad this isn’t the ‘real world’. )