The classic whiteboard feature will allow you to share a whiteboard that you and other participants (if allowed) can annotate on.
Classic whiteboard is different from the new Zoom Whiteboard, which is a persistent digital canvas. Learn more about how to use the Zoom Whiteboard
Note: By default, the new Zoom Whiteboard will launch instead of the classic Whiteboard, even when specifically selecting that option in the share window. It is however, possible to change settings and continue using classic whiteboard.
If you have simultaneous screen sharing on, multiple participants will be able to share a whiteboard at once. However, to see two whiteboards at once, or your own whiteboard and another participant's, you will need to have dual monitors enabled.
Note: Whiteboard is currently available for iPad only. If you are on an iPhone, you will not see the Whiteboard option.