In development
OneDrive: Anchored comments in the PDF viewer
From Microsoft's description: “This feature will be on by default and requires no admin action.”
Microsoft is adding anchored comments to the PDF viewer in OneDrive and SharePoint on the web. Users can attach a comment to a specific spot on a page, to selected text, and collaborate through replies and @mentions — bringing PDF review to parity with commenting in Office documents. This feature will be on by default and requires no admin action.
Affected: OneDrive, SharePoint