When using Canvas as a viewer, the user may try to vote on the sticky notes, or try to locate the toolbar, and think that something is broken, when in reality they are looking for features available to editors only.

We should consider adding some visual indicator of the "view only" status e.g. a banner or a badge at the top, an icon over which a user can hover over to get more info, or an icon by the cursor arrow to indicate editing is disabled.