The multi-user whiteboard is a popular feature in BigBlueButton. Now, in BigBlueButton 2.3, we have added the Per-User Whiteboard to help with user engagement and allow instructor's to choose an individual user to mark up the presentation.
To enable the Per-User Whiteboard, select a user  and then select Give whiteboard access .
Once you have given an individual user whiteboard access, a pen icon appears next to their avatar.
The user now has all the capabilities outlines in the multi-user whiteboard article.
When granting individual whiteboard access, a count will appear on the multi-user whiteboard icon showing you how many students you have granted access to the whiteboard.
How do I remove Whiteboard access once it has been granted?
There are two ways to remove Whiteboard access.
Clicking the multi-user whiteboard icon  removes whiteboard access from everyone except the presenter.
You can also remove individual users' access by clicking their user name  from the list of users and then clicking Remove whiteboard access .