Within Teamwork Desk, you and your agents can
    add internal notes to tickets, to discuss with
    your team.
Note: Any notes left on a ticket are
    visible to any internal agent/administrator
    who can see the ticket. Notes are not visible
    to the customer submitting the ticket.
Notes can be added by clicking the Note tab within a ticket. 

Files can be dragged and dropped
    into the
    notes are, or you can brows to add a local
    file. 
When finished editing the note, the ticket
    status can be changed and/or reassigned before
    the note is added.

When adding a note, you are able to
    choose a next action once the note has been
    added. The Add Note dropdown options allow you
    to choose from back to folder, next active,
    and stay on page. 
 Pinning a note
When creating a new note on a
    ticket, you can choose to pin it by selecting
    the Pin this note checkbox in the
    bottom right of the note field before
    clicking Add Note.

By default, pinned notes will be
    displayed collapsed at the top of the ticket
    view and a pin icon will be displayed to the
    right. Pinned notes have a brighter yellow
    color to differentiate them from unpinned
    notes.

Note: There are no
    restrictions on how many notes can be pinned
    per ticket.
Click the pin icon to unpin the
    note. The note will be unpinned and moved from
    the top of the ticket thread to its new
    position based on when it was originally
    created.

To pin an existing note in a ticket
    thread, hover over the note to reveal the pin
    icon. Once you click pin, the note will
    automatically move to the top of the ticket
    thread.

Note: All agent can pin notes, however the ability
    to edit pinned notes depends on your site
    level agent
        permissions. 
For more information, see: Forwarding Tickets