HTC Verizon windows phone 8X User Manual page 76

76 Messaging
If the contact has more than one phone number or email address,
you can tap
Why can't I reply to my friend using
Facebook or Messenger on the same thread?
If you're friends with someone on Facebook or Messenger, you may
have several different contact profiles for the same person. Their
phone number, Facebook, and Messenger info may be stored as
different contacts on your phone. In this case, you need to link these
contacts manually.
Open the People app and link them.
Copying and pasting a message
You can copy a previous message and paste it into the new message
you're composing.
1. In the threads list, tap a contact (or phone number) to display the
exchange of messages with that contact.
2. Press and hold the message you want to copy, and then tap copy.
3. Tap the text box where you're composing your new message.
4. To paste the copied message, tap
to choose another one.
.