I'm using Acrobat Pro 9.3.1, OS 10.6, and I'm creating PDF output from Keynote, strictly for on-screen viewing. I would like to use Acrobat Pro to create a compact PDF file with screen-resolution graphics, however I keep running into problems with color changes applied by Acrobat.
The document contains bright RGB colors. It also contains images, some of which are high DPI resolution.
* If I use the OS X "Save As PDF..." feature, the generated file is about 32 MB. Opening the resulting file with Preview, the file looks fine. Opening the resulting file with Acrobat, though, shows the bright colors in the file as very drab-- almost as though it's been compressed into CMYK space. Once it's in Acrobat, I can use the PDF Optimizer and save it as a mostly-adequate 10 MB file, but the color issue is annoying.
* If I use the "Save as Adobe PDF" feature, and save the file with "standard" settings, the resulting PDF file is 27 MB. If opened in Acrobat, it shows the same CYMK-like color compression, and if opened in Preview, it shows the bright colors.
* If I use the "Save as Adobe PDF" feature, and save the file with "PDF/A-1b:2005 (RGB)" settings, the resulting PDF file is 50 MB. In both Acrobat and Preview, it shows up with full and correct colors. So obviously Acrobat is capable of handling RGB after all. But this format is not really compatible-- it throws a warning about viewing in that format, and has all kinds of graphical glitches. And, the file is even larger than I started with.
So, what I would like to know is this: How can I set up acrobat to let me produce those nice 10 MB files, without showing the funny color compression?