Load the favorite games on your computer, and start playing that game in the virtual display.The controls can help you to get the keyboard or the map of the control to an external gamepad.And install it on your computer, to play the favorite Nintendo old games on your computer.Download Citra Nintendo 3D emulator for Android from the given download link.Or get the alternate between the screens by just pressing one button. But, if you want to get one screen at one time, the settings can help you in this regard. This emulator can display both the screens at the same time which is quite a unique feature.