Pointer within whiteboard

Hi,
I really like Coccinella, and I find the shared whiteboard very productive.
This is a (simple) feature request.
It would be very useful to have a "pointer" (e.g., an arrow) that could be used by a user to focus the other users to some area of the whiteboard in real time, while a voice/video conversation is going on in parallel. Marratech has something like that (an arrow indicating also the user who's pointing).
Do you think it could be implemented somehow?
cheers
--e.