Please add the option to save a pdf opened in the OneDrive PDF viewer as a new file name when desired. The missing "copy to" and "save as" functions seem like really basic and critical options that should always be present when working with or managing files. This is a deal breaker sometimes when trying to access, use, markup, edit, and manage PDFs in the field on a phone or tablet (iOS or Android). There are work arounds, but they are too cumbersome to expect most people to deal with them reliably.