My next post could be veering a little bit OT, but all this stuff is so inter-related! I'm starting with images in ProPhotoRGB, editing in ACR and Photoshop on a Windows7 computer, then printing to a Canon iPF 8300. If I print from Photoshop, is my file being printed as an 8-bit file, while if I printed from the Canon plug-in, it would be read as a 16-bit file? (I became confused on this point, especially after reading Jeff Schewe's post.) My first (earlier) question was posed thinking black point compensation was the deciding factor in deciding which software to print from. Now I am wondering if the bit-depth of the file at the printer end of the process is also a factor. I do think I've comprehended the discussion to this point; but this aspect remains unclear to me. At first, I thought what I was giving up by printing from Photoshop was only the stickiness of the settings in the Canon plug-in. Now I am wondering if, to keep the file 16-bit to the very end, I need to print from the plug-in. And then, of course, there is the question of whether keeping it 16-bit makes any/much difference in a final print. I am enlarging images to print at 20 or 30-inch shorter dimensions, and imagine that an enlarged image might be more prone to posterization in the printing process (but maybe I am wrong about that). Would you all be so kind as to weigh in to clarify this? --Barbara P.S. I actually enjoy the complexity of each of the aspects of digital photography and printing and enjoy understanding what I am doing. If it were easy, anyone could do it!