How do I create a draft when making changes to the application?

Specifically, I want to change the schema by introducing a few more items in schema. I am following the instructions here: https://docs.mongodb.com/realm/deploy/deploy-ui/#make-changes-to-your-application

Under step 1, it says make changes to my application - using the left hand navigation, I move over to Data Access - Schema and make my change and hit save. It looks like this gets deployed automatically.

Can someone assist?