How to set the background in PowerApps

When you create a new Power App you get one of those ugly white screens. Do you know how to change the background?

On the right hand of your screen you can find the Fill, the Background image and the Image position.

Fill

Normally the fill is set to white, but you can change this by clicking on the little paint pot

Background image

By default the background image is set to None, but you can change this by clicking on None.