This option hints the input method for selecting
calendars to view. You can use either a text-entry-box or a
drop-down-menu. The advantage of using an entry box is that
you can type in multiple calendars to create a combined
view. The advantage of using a drop-down menu is that
you don't have to remember any calendar names, and can
switch to other calendars with one mouse button click.
If your calendar admin have configured your calendar
server to use entry-box for calendar selection, then
drop-down menu will not be available.
There are 4 possible choices for this option, see diagram.
If you select 1, then an entry box will always be used
no matter what calendar you're viewing.
If you choose 4, a drop-down menu will be used whenever
possible.
For the other two choices, the calendar chooser is determined
by the calendar you're currently viewing. Let's say you are
me, and you've chosen option 3. When you view your own
calendar me, a drop-down menu will be used. If you later
visit calendar other (while login as "me"), then the
calenar chooser is determined by the choice other has
made for this option. If other has chosen option 1 or
2, then an entry-box will be used; if other has
selected 3 or 4, then a drop-down menu will be used.
In short, option 1 and 4 are sticky while option 2 and 3 follow calendars.
Each user may have a list of "interested calendars" (created
by the "other calendars" option screen). Drop-down menu will
be populated with this list if created.