Palm Pre User Manual page 256

Instant messages for an IM account you already have set up online (see "Set up an
Instant Messaging (IM) Account" on page 263).
The Synergy feature enables the Messaging app to gather all of your text, multimedia, and
instant messages to and from the same contact or phone number into a single conversation
(sometimes called a thread). So you can see your entire message history with a person
regardless of the different methods you happened to use to communicate with that person
(see "Work With Conversations" on page 256). You can even switch from account to account
without losing the thread of your conversation (see "Switch Between Messaging Accounts in
a Conversation" on page 257)—just pick the messaging account that's most likely to keep you
in unbroken contact with the person you're talking to.
Work With Conversations
When you exchange more than one message with a person, the messages are grouped into
a conversation. A single conversation can contain text, multimedia, and IM messages. When
you start or continue a conversation, the upper part of the Conversations view displays all
messages exchanged with this person, and the bottom part provides the area where you type
your next message.
You can carry on multiple conversations at the same time.
1. Open Messaging
2. Do one of the following:
Start a new conversation: Create a message (see "Create and Send a Text or
Multimedia Message" on page 258 or "Send and Receive IM Messages" on
page 265), or tap a message and reply to it.
Continue an existing conversation: Tap the conversation.
3. Enter your message.
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Section 3B: Your Email and Other Messages