A paper I used in class today to elaborate about stress and hierarchies (Sapolsky, 2005) was the subject of a letter in another issue to which the author responded. I downloaded that pdf as well. Then later I downloaded a high-res image and annotated it.
So now I want to combine the two pdfs, remove the additional pages (the letter was buried amongst another three pages) and include the separate high-res jpeg image.
Well, its pdflab (donationware) to the rescue! It does all that and more and one sweep too.
E.g. the image below shows that I cut three pages out of a four page pdf.