This article explains how you can toggle on/off the initials only switch for staff. 

1. Navigate to the settings tab from the navigation menu on your screen's left side.
2. Locate the Staff Setup tab and click on the Misc. Settings menu. 
3. Initials Setup:
   1. If you want to only see the initials of the staff in the Calendar View, switch on the "Only Initials" toggle. 
   2. If you want to see the staff's full name in the Calendar View,  switch off this toggle.