The mobile commenting feature of OneDrive has been expanded to non-Office file types, including photos, videos, PDF documents, and over 300 other file types. Prior to that, the feature was only working for Microsoft Word, Excel, and PowerPoint documents.
You can now add new comments, view and reply to existing comments, delete comments, and perform more such operations on any of your OneDrive files from your Android device. Continue reading to know more about it and it's availability.