Options for page numbers and thumbnail views when signing

We have envelopes that contain multiple multi-page documents. When our signers are reviewing them, it would be helpful to be able to navigate by page number within the entire set of documents. For example, if there are 3 15-page documents, being able to go to page number 17 of 45 to get to the second page of the second document. 

In the thumbnail view, having an option to collapse or expand all documents under their headers would also be very helpful, so that reviewers don’t have to click to close them one by one.