Copy-Paste graphics from pdf into Keynote
When preparing presentations (in Keynote or PPT) I often need to copy selections (graphics, not text) from PDFs and paste them into Keynote/PPT. So far I'm still looking for a PDF reader for iPad that lets me do that. Some allow you to copy text, but I'm still looking for one doing that for graphics. My questions are:
(1) Does anyone know whether you can copy-paste in principle from another application into Keynote on iPad? I think it should be possible, but you never know...
(2) What PDF reader would be able to do that (if any)?
Thanks in advance!
Mac Pro, Macbook Pro, Powerbook G4, iPad, iPhone OS 3.1.3