The RollCall Calendar
When you first open RollCall it takes you to the Calendar. Instructors take attendance by clicking on the course listing on the day for which they wish to take attendance.
The Calendar has four views: Month, Week, Day and List.
The default calendar view can be changed to best match your organization's preferences. The default is set for the entire organization. This should be changed by 501Partners at this time, but user documentation is coming soon!
Calendar colors are set by a field on the Course, or on the Instructor. You can choose which drives your color display, or set up something entirely different (as long as it can make its way to the Session record.) Like the default view, this should be changed in collaboration with 501Partners.
If you aren't seeing a course you expect, check the Session records - they create the calendar entries.