While in game flying an aircraft, the pull up menu should have an option called screen shot. After selecting it would bring up a menu sort of like the one in editor that lets you take screen shots for an upload, instead make it in game, freeze the aircraft, and remove everything from the hud except for a button that says take picture or something. After that it will send you back to the default pop up menu, and it'll save a photo to your devices gallery or desktop.