Watch the video How to Make a Mindmap on PowerPoint in 60 Seconds ( )  or follow the steps below taken from https://zapier.com/blog/mind-mapping-tutorial/ :

Mind maps are a visual way to organize your thoughts around one topic using words, colors, images and numbers to highlight ideas and draw connections.

1. Start in the Middle With a Central Idea

This can be a word or an image/picture that represents the central topic you’re going to map.

2. Create Branches to Represent Sub-topics

These should be limited to words or short phrases. Keep a good amount of space between your ideas to leave room to add on later.

3. Add Details to Your Mind Map

You can vary colors, word cases, font styles, and even the thickness of your branch lines to separate or group different topics or ideas. Or, you can add photos, notes, and more to add more detail to your map. 

4. Make Connections

You can draw lines or arrows between ideas in the map that you want to connect.

Keep expanding for as long as you need to. You might feel done with your map after one sitting, but it could also be something you keep and adjust or add to over time.