Add vertical scrolling and bookmarks to pdf view
I normally use the Documents app by Readdle for PDF viewing and annotation. Now that you have added PDF markup to OneDrive (for which I thank you!) if you added vertical scrolling as an option for viewing PDF's in the settings, and if you added support for bookmarks in PDF's, I could probably abandon the use of Documents by Readdle and switch over completely to OneDrive for most of my mobile PDF needs.
Wonyong Park commented