This is in the software mindmaster? How to get rid of numbers? Be mindmanager.

This is a function in MindMaster mindmanager. This-symbol can be clicked, and the content of the secondary theme will be reduced after clicking. This can't disappear temporarily when drawing, but if you want to export pictures or print pictures, you don't have to display them. So it doesn't actually have much impact.

You can try to export it.