I love the examples you have showing how you can group by a category. Is it possible to add multiple categories to an appointment and group by it? For example, lets say using your TV Schedule example, a show might be Sports and Documentary. So when Grouping, I would like to see the Appointment come up in both Sports and Documentary. Obviously, I have to be able to select multiple categories. But how to group by them as well? Would be a HUGE Help if you could give me some direction.