Hiding non-schedulable user's calendars is easy!
FROM THE WEB APP
Step 1: Go to Calendars.
Step 2: Click on the settings 'gear' icon.
Step 3: Select 'Show non-schedulable users'.
Step 4: Click 'OK'
Step 5: Done!
Time Saving Tip: Gazelle users can only see their calendar unless they are an 'Administrator' or 'Office Assistant', in which case they can see other user's calendars. By default Gazelle hides non-schedulable users, but you can change this setting by clicking on the calendar gear icon and choosing to display all users.
FROM THE MOBILE APP
Step 1: Tap on Menu > Calendar.
Step 2: Tap on the settings 'gear' icon in the top right hand corner.
Step 3: Choose 'Calendar Settings' from the list.
Step 4: Toggle 'Show non-schedulable users'
Step 5: Tap 'OK'
Step 6: Done!