How To Adjust Screen Size On Ipad Air. On the left-side menu choose General to display the general-purpose device settings on the right side of the screen. IPad Air 97in iPad Pro also includes original iPad line eg.
If you need help understanding how the screen-size in retina display works you can check this iPad screen size guide by Kyle. Quick NavigationiPad 1 1st Generation Screen Resolution iPad 2. The iPad the iPad Mini the iPad Air and the iPad Pro.
While you cant choose an arbitrary size for the app icons the choice between two presets seems like a great start.
Open your iPads Settings app. For example the official Netflix app outputs the original aspect ratio to the external screen. Tap on Display Brightness from the left-hand side menu. Other than that as far as I know there is no way to change anything like that at least without Jailbreaking and I strongly recommend against that.