I've got a PDF of a large map that's 23MB, 150" x 130". I cut out segments as needed using the select tool in Preview, copying and pasting it to a new document, which I save as a PNG. Not the most elegant solution, but it works. The trouble is, Preview chokes on it. Zooming is slow, and it takes 15 seconds to copy a selection, and another 15 to paste it into a new image. I've made 5 individual maps so far in this session, and Preview is using 1.44GB of RAM. Is there another tool that would be faster for cutting up a large PDF? It has to stay a PDF in the large form, because it has searchable text I use to find the region needed.