There doesn't appear to be a feature that allows users to rotate documents if they need to be viewed in landscape.
Additionally, the highlight feature is not always usable. It would be helpful if the highlight feature worked similar to how it does in Adobe Acrobat--if the document is scanned, the highlight feature works like a marker (you "draw" the highlighting on). If the doc is simply a converted file or from the internet, the highlight feature
highlights word by word.