I haven't found a clear answer and lots of non-responsive answers (e.g. reformat in source document), so here goes
1. Assume no source document that can be edited in original format. Just a pdf with words, diagrams, etc, but not having the margins legally required for recording with county recorder (1" all around).
2. I want to take the pdf and shrink it as needed to fit onto 8.6 x 11 page with 1" of white space all around the text or diagrams or whatever
What page size and margins does you have?