Can users provide in-line feedback on content topics?

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Is there a way for users to provide in-line feedback within a content topic itself? E.g. If a Course Designer sends their course for review with their Subject Matter Experts (SMEs), can SMEs add their comments directly in the HTML topic?

 

I thought I saw a tool for this a couple of years ago, but I might be confusing it with the Annotations tool, only available in Assignments.

 

I've pre-emptively created a PIE: https://desire2learn.brightidea.com/ideas/D9403