You can enable rich text for treatments on an exam flow by exam flow basis. To enable the rich text treatment option, you can go to "Calendar Management" from the system gear menu in the upper right hand corner of VetBadger.
Once in Calendar Management, you can select "Exam Flows" to go to the exam flow manager.
Here you can edit any of the individual exam flows as well as editing the clinic default. If you don't have any specialized exam flows then the clinic default is definitely what you want to edit.
Once you select edit for an exam flow (or edit the clinic default) you will open the exam flow editor.
In the exam flow editor you want to select "Enable Rich Text Treatments".
Once selected you just click "Save" and this will be applied to all FUTURE exams. That last part is key, VetBadger copies off the details of an exam when an exam is created in order to prevent changes from altering historical exams. This includes exams which are currently open / unlocked.
Once you do check in a new exam tied to this exam flow, you will see the ability to make a treatment rich text like so.
If you select the "Rich Text", the rich text editor will then be used for this treatment.