I like the initiative, if it's not a problem I also to suggest the possibility that If you create an alias appears all the stats (nicks together) in the same HUD, would be very useful for multilobby is one of the biggest mistakes HM2 has and PT4 won a lot with that possibility.
This feature is not intended to mark the hands but it is used to write notes for the player.
Actually, by clicking "N" you insert a short visual representation of a hand into a Notes Container for an exact player instead of describing this hand in words:
And then you can see these notes by hovering a mouse over Notes Icon in your HUD:
In the same way, you can insert a hand into a note while not playing: