while updating the manual, there are Taco's new primitives: \pdfimagegamma \pdfgamma and \pdfoptionpdfimagehicolor \pdfoptionimageapplygamma Trivial thing only: i wonder whether they really must be this long (there are already some very long ones, like (line break here) \pdfoptionpdfinclusionerrorlevel). Won't \pdfoptionpdfimagehicolor --> \pdfimagehicolor \pdfoptionimageapplygamma --> \pdfimageapplygamma serve as well? E. g. there is also \pdfadjustspacing, not \pdfoptionadjustspacing. BTW the new ones are not dumped into the format, so maybe one could say that only things with "option" would be dumped? Which are criteria that some stuff should be dumped, other not? Regards, Hartmut