Review a document
    - Open the document that you want to review.
 - Tap inside the document.
 - ClickFile > Review.
 - Do any of the following:
- To track changes in the document, turn onTrack changes.
 - To show changes in the document, turn onShow changes.
 - To add a comment to the document, tapComment.
 - To accept a change to a document, tap the change and tapAccept.
 - To reject a change to a document, tap the change and tapReject.
 - To skip to the next comment, tapNext.
 - To skip to the previous comment, tapPrevious.
 
 - When you are done, clickReview > File > Save.