Amanda,
I would not give a reviewer a document in a form that would allow the reviewer to edit the content. The reviewer may not know how to use the application and screw things up. Create a PDF instead (print to the Adobe PDF printer; do NOT save as PDF, it does not always work correctly). Open the PDF file in Acrobat, enable it for markup (select Comments > Enable for Commenting and Analysis in Adobe Reader), and save it. This allows the reviewer to add comments, strikeout text, insert text, and otherwise mark up the PDF file with changes. Then you transfer the changes to the Frame files. This gives you control over the formatting and wording, something the reviewer may not be good at.
Van