With the 'Filling in Forms' restrictions needed for use with formfields, you can only edit the formfields and unprotected Sections of the document. If there's a portion of the document where you want free edits to be allowed, insert continuous Section breaks before & after that portion (via Page Layout>Breaks). When you then select the 'Filling in Forms' restrictions, a 'Sections' link will display. Click on that and you can designate which Section(s) to leave unprotected.

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Cheers,
Paul Edstein
[Fmr MS MVP - Word]