Palm Pre User Manual page 174

If you change an event, the change is made in the appropriate calendar.
You can also look at the events of just one calendar at a time.
Use Calendar for the First Time
1. Open Calendar
2. Do one of the following:
To set up your first online account to sync: Tap the account type, enter the account
information, and tap Sign in.
To set up a second online account to sync: Tap Add An Account, tap the account
type, enter the account information, and tap Sign In.
To open Calendar without creating an online account: Tap Done. This opens your
Palm profile account, and you can start creating events in this account.
Note
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If you choose to sync Calendar with an online Facebook account, your
Facebook events show up in Calendar, but you cannot add calendar events
to Facebook from the Calendar app. To work directly with Facebook on your
phone, go to the Web application (see "Web" on page 277).
Section 2F: Your Personal Information Organizer