One of the plugins in IoFlex's IoBookMaker Suite,
IoAlign provides basic page positioning for raster and vector PDFs. For
all pages or a selection of pages, the features include
Page positioning using bounding box detection. The page data is then
either positioned based on an offset from the corner of the bounding box
to the corner of the new page size, or the center of the bounding box to
the center of the new page size.
Resizing to a smaller page, by canvassing (i.e. masking from the page
Resizing to a larger page size by repositioning the print area to the
center or any of 8 other edge or corner locations within the new page size
Moving page content by specified horizontal and vertical offsets.
Includes page-positioning logic for dealing with double-sided pages.
OK, so you want to stamp your document. Maybe you need to give reviewers some advice about the document's status or sensitivity. This tip from author Ted Padova demonstrates how to add stamps with the Stamp Tool along with related comments.