The calendar settings control can be used to set various defaults for your calendar.
The default view section can be used to set a default calendar view such as "Month View" or a default interval for the time ruler. For more information please see the calendar documentation.
The workdays setting lists a series of check boxes which can be used to indicate workdays versus nonwork days. If a day is checked it is considered to be a workday.
Workdays are very important for CompleteProject as they affect three different areas of the program. First, workdays are displayed differently from non-workdays in the calendar. Second, nonwork days will be clearly displayed in the Gantt chart. Finally, when setting a task due date nonwork days will be ignored and you will be prompted to confirm if you attempt to set a due date on a nonwork day.
The sound section can be used to select a sound which should be played when a calendar reminder is triggered.