Adding a sub category on the calendar?

Hello,

I was wondering to see if anyone has built a sub-category on the calendar? We need both of these options for instance
image
we would need to add more detail to the Established Facility Patient for instance “Echo Study” it is also needed for a report we are creating

@sborjas,
Are you trying to insert an new field named “Sub Category” below the category option?
If yes, it requires some code customisation.

Thanks,
ViSolve