From Microsoft Corporation
MC226028, Stay Informed, Published date: Nov 6, 2020
New feature, User impact
We are adding a bookmark that makes it easier for users of OneDrive for iOS to return to a specific page in a PDF document.
This message is associated with Microsoft 365 Roadmap ID 68842.When this will happen
The rollout to the Apple Store will begin in late November; we expect it to be complete in late December.How this will affect your organization
This bookmark feature allows end users to add or remove bookmarks using either the bookmark icon on the toolbar or via the context menu in long-press gesture, whether that press is on text or in a non-text area.
Users can view bookmarked pages using thumbnail (grid view) mode.
What you need to do to prepare
You might want to notify your users about this new capability and update your training and documentation as appropriate.