Adding Comments to non-Microsoft files in SharePoint Online and OneDrive

One of the many benefits of storing files in SharePoint Online or OneDrive as opposed to file shares is the ability to add comments to the file for additional context and collaboration. However, until recently that was only allowed for Microsoft files (such as Word, Excel, etc.) Now the ability to add comments has been extended to non-Microsoft files, such as PDF files. Here’s how that works…

While in a SharePoint Online document library (or OneDrive), select the file that you’d like to add a comment to:

Hover over the Vertical Ellipsis icon and select the See Details option in the pop-up box (or just click the Information Icon in the menu bar on the far right side):

In the Information panel, scroll down until you get to the Activities section. Enter a comment in the Comment field and click the Send icon:

Your comment is added to the Activity section, and it is now part of the file: