React Native: Unwanted Black border on ipad 2 simulation

Question

I am testing a new (simple) reactive native app, choosing ipad 2 as target in the simulator.

The loading screen shows full screen, but the first application screen (

Answer 1

The application was being built as an iphone app, but deployed/displayed to an ipad. I see the 1x / 2x button. This was causing it. So: how do I configure xcode that it is actually an ipad app? See url below:

How to change iPhone/iPad app to iPhone only?