Entities Tab
This is the UMC section where you can add your entities.
At first this is empty but you can add as many entities as you want using the Add entity button at the top right corner.
Clicking on Add entity will add a section in the tab like the image below:
The section contains 6 collapsible fieldsets. They are grouped like that for a better user experience.
If you decide you don't need the entity, or added by mistake, you can use the Remove entity button at the top right corner