HTC T-Mobile G2 User Manual page 129

Gmail
You can add one or more people to an ongoing conversation by
replying to all and then adding the new people's addresses to the
reply.
All of the messages in the conversation, up to the one you are
replying to or forwarding, are included in the new message; any
messages that follow the message you forward are omitted.
Touch Send.
3
T-Mobile G2
Enter your reply.
Uncheck to send your reply
without including the original
message.
129
User's Guide