Page Level Commenting
Commenting needs to be done at the page level for multi page documents. It has no real value to me without this feature. The ability to annotate comments would be a bonus feature.

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Dean Morrison commented
Agree, right now I use Gooogle Drive for all my file sharing simply because of the newly added features of Commenting directly on an image or pdf. (as in they can select or highlight something and comment on it like you can in Acrobat) If Creative Cloud could replicate and make that feature even better it would be awesome. Also adding a simple Approval system directly to Creative Cloud would be amazing. While there are existing systems out there and they are great for teams that agree to use them getting clients to sign up and use a third party tool is a pain.
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Thank you Theresa. This is definitely an important feature and one that's being explored. Look for this in the coming months.