To return to your calendar, use your browser's Back button.

Selecting appointment options
Option
Result
Categories
Lets you establish one or more categories for the appointment.
Warn of conflicts
Alerts (default) or doesn't alert you when there is a conflict with the appointment and another appointment.
Pencil in
Enters the appointment as tentative.
Confidential
Makes or doesn't make (default) the appointment confidential, so others who have access to your file cannot view the appointment.

See also:

Working with categories
Assigning a category to an entry