You can mark a text message conversations as either Read or Unread.
To mark a conversation as Read or Unread
2. In
the top-right corner, click the
icon.
3. From
the options menu ( in the top-right corner) of the
text message you want to hide, click Mark
as Read or Mark
as Unread.
An Unread conversation appears in bold and has a blue dot next to the Importance icon (banner).