New Calendars can be added by clicking the New
button, which will launch the New Calendar dialog.  The New Calendar Dialog
contains a list of current calendars on the left, and on the right is a text
box that allows you to name the new calendar.  Below the text box are three
options for creating the calendar:
Derive from a calendar - creates a child calendar.
The new calendar will inherit the settings
from the parent calendar selected on the left.  Any changes made to the
parent calendar will be reflected in the child calendar.  In the example below,
"Americas" and "USA" are examples of child calendars.
Copy an existing calendar - creates a copy of the
calendar selected on the left.  After the copy is made, changes made to the
original calendar or its parents are
not reflected in the copy.  In the example below, "USA - Copy" is an example
of a calendar created using this option.
Create an empty calendar - creates a new calendar.
No settings are inherited or copied.  In the example below, "Empty" is a
calendar that was created using this option.
