Once you have initiated the board
update process, message headers will begin to appear in the appropriate
window as shown below:
In the above example, a board named mp3ogg has been selected in the
boards window. In the highlighted "Message Header Window" there
are six (6) message headers. When you left-click on a message
header it becomes selected and turns blue. It's associated message
then appears in the highlighted "Message Window". Please notice
that the third message header down has blue lettering in the "From"
column of the Message Header Window. This indicates a message with
an attached file.