To achieve the hyperlink effect, you could put formfields at the start of the document, similar to what you originally tried with the macrobutton fields, that trigger an on-exit macro to take you to another location in the document - provided of course that that location is itself another formfield or an unprotected Section.

With forms protection, there are numerous other editing restrictions that are placed on the document in addition to not being able to select protected text. For example, you can't insert a picture into even an unprotected Section of the document. Neither can you use spell-checking.

Just speculating, I'd guess MS originally conceived this functionality as being used in documents that would typically only be a few pages long or, if longer, would have all the user input being done in the first few pages and cross-references being used for replication elsewhere. Accordingly, the only navigation thought necessary was via the tab key or the scroll bar.

Given that you're using Office 2010, though, I suggest you investigate the use of content controls. These give you much greater flexibility and can even be used without protecting the document.

__________________
Cheers,
Paul Edstein
[Fmr MS MVP - Word]