How to Change the App Layout

In App Builder, you can find the App Layouts tab, where you can choose from a few premade layouts and apply it to your App. Each of the layouts has a different style, and based on that, the icon, size, shrink mode, alignment of the app header are updated automatically. Here’s all you need to do:

1. In the App Builder, click on the Paint Roller icon to open the App Designer panel.

2. Navigate to the App Layouts tab, hover over the layout you want to try. 
3. And, click on the Use Layout button to apply.