Can you paste an image to discuss into the whiteboard on Canvas Conferences?
I have had a look as this runs on BigBlueButton, unfortunately, at this time, it appears the whiteboard is only for drawing, you can have a look at their support article on how to use the whiteboard here https://support.blindsidenetworks.com/hc/en-us/articles/360023119332-Use-the-multi-user-whiteboard-
I think you would need to present your screen as the alternative option, but you can not then have multiple users annotate it.
I hope that helps!
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