What is 'My Schedule/All Calendars'? How do I use it?

About My Schedule/All Calendars

・View multiple calendars at the same time

・View TimeTree calendars with other calendars (Samsung, iCal, Google Calendar, and more)

How do I use it?

・Select Main Menu

・Select "My Schedule/All Calendars"

・Tap settings on the lower right corner

・Select calendar(s) to display