There used to be a PDF export option in Photoshop, but it's gone in CS4.
What replaced it is Bridge, however no matter what I do, Bridge ends up resizing my image. The physical dimensions (cm/inches) in the final PDF are not what they are in Photoshop.
Any tips on exporting an image without messing up its size?
(Clarification: I want the final PDF to contain a page of the size I specify, with a white background, and my image positioned somewhere on this page such that the image width/height in cm is exactly the same in the PDF as it was in Photoshop.)