How to change theme on Master slide on Microsoft Powerpoint.

First open a new blank page on Microsoft Powerpoint...
.

Then click on the Design tab which is next the one next to the Insert tab..

After clicking on that, there are many different designs to choose from..

There are also many more once you click on the 'more' arrow which is a tiny arrow next to the different designs..

Loads of different designs should appear..

After choosing the design you like this is how it should appear on your master slide..

When you open a second slide, the same design should appear like this..

 This tutorial is now completed.