It actually contains no fields, as such. In effect, it's the same as a document designed to be printed and filled in by hand, but you've been provided with the electronic version converted from a PDF.

On page 3, for example, where you're supposed to fill in the vendor name there's just a graphic with a partial bottom border - nothing you can actually fill in. The horizontal line below 'Street' is another graphic. It's a similar story with the trustee in item 2 and the business name in item 3 and the last line in item 4. And, if you have Word's formatting display turned on and select the paragraph break near the bottom of the page where 'column break' appears, Word will select a frame that covers most of the page.

In other words, this is not a document designed to be filled in electronically.

It's possible the original PDF had fields to be filled in, but PDF fields don't convert to Word.

A properly constructed form in Word that's designed to be filled in electronically would use formfields or content controls. Your document contains neither. If formfields are used, the only parts you could select would likely be the actual formfields. If content controls are used, what you could select can be much more flexible - or just as restrictive as formfields.

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