Click on Action > Manage User Options from the top menu bar.
User Options - Calendaring Tab
Show a confirmation dialog before deleting appointments and tasks. Set by default. Unchecking this option will suppress the confirmation prompt when deleting calendar appointments and tasks.
Enable Reminders. Set by default. Unchecking this option will suppress all calendar reminders.
Default Calendar. Set to personal Calendar by default. This option allows user to select which calendar will open by default when creating a new appointment using the Action menu > New Appointment.
Day Start Time. Set to 5am by default. This option controls the actual start time of the day to display on the Day Calendar.
Day End Time. Set to 10pm by default. This option controls the actual end time of the day to display on the Day Calendar.
Note: Click Show 24 Hours to display (located at bottom of page of the Day Calendar) all hours of the day on the Day Calendar.
Workday Start Time. Set to 8am by default. This option controls the work day start time by setting a darker contrast on the Day Calendar.
Workday End Time. Set to 5pm by default. This option controls the work day end time by ending the darker contrast on the Day Calendar.
Minutes per Row. Set to 30 minutes by default. This option controls the number of minutes between each displayed row.
Number Of Days to Display in Multi-Day. Set to 3 by default. This option control the total number of days to display when using the Multi-Day function. An option found in the top right corner of the main Calendar page.
First Day of the Week. Default is Automatically Determined. This option controls which day of the week to display for the week. (e.g. United States uses Sunday as the first day of the week)
Initial View. Default is Day. This option controls the initial calendar view when tab is displayed. Options are Day, Week or Month.