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Its flat. I didnt add any layers, to it, and to make sure I just right clicked on the pdf and selected flatten image. And after that the print buttons are still greyed out

Does PS have a size limit? I wouldnt think, as long as my plotter can plot it, but I dont know what else could be wrong. I might try cropping off huge sections to see if i reach a size where its not greyed out

Id say I would do all of my PS work, then save as, pdf, but  it only lets me save as tif, and its a huge image.

Thanks for the help