Click on the Hamburger Icon.
Step 1 : Click on Clinic and staff settings and then Appointment Management from the drop down that appears.
Step 2 : Click on Appointment Type
Step 3 : Add the appointment name and the color. Add notes if needed and click on save.

* Drag and Drop rows in the table to re-order status. - This is where you will be able to set the order for the appointment types while scheduling a client/pet. Please refer the screen shot below.