Seems like the old option under Preflight for Convert to Gray Scale is gone and I can't find anything else that might do it. Any help out there?
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We would certainly help you.
Open the PDF in Acrobat DC and choose "Print Production > Preflight" and choose Convert to grayscale under Convert Colors category.
Hope that helps.
Any possibility this answer can be updated to the 2017 version - my options don't match and, although I figured it out eventually, an updated screen shot showing the current interface would help others.
I don't think it changed much, and you can post screenshots yourself of the new location, if you wish...
I didn't think of that - duh!! These screen shots are from the Windows version (Windows 10 Pro).
The preflight choices in the current version of Acrobat DC include both convert to grayscale and digital printing b/w. They do not produce the same results. Convert to grayscale may leave a spot plate; and all 4 (CMYK) plates are still there even if content is only on the black plate. Digital printing b/w puts everything only on the black plate and only a black plate still exists; there are no CMY plates in the document any more.
The Digital Printing (B/W) profile under the Essentials Preflight Library has much more baggage than you really need simply to convert colors. Some of the checks and fixups are highly irrelevant. In the same Essentials Preflight Library, you are much better off using the single fixup Convert color to B/W in the Color spaces, spot colors, inks group which limits it operations to strictly conversion to grayscale.
The instructions are helpful but they dont' work anymore. You can't chose "save pdf" - instead of going ahead with "Print" document. Throws up an error saying - chose save instread of print... I've tried many other setting including in print production - which is not what I actually want to do... Just a long long work arround. None work.
I can't believe I'm paying a billion $ company for software that has overlooked such a basic function on a program.... Why do adobe not have a simple menu option like in Photoshop and Illustrator for document colour management that allows you to convert to grey scale. Would that be too simple???
Thank you!!! This really helped 🙂
How do I access the Print Production tab?? Or the Preflight in Adobe Acrobat Pro DC? Not seeing the same tool bar...
right after I posted this..I found it!!!!!!!!!!!
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That did it! Options have moved around a bit in the DC version.
While this does get me a great greayscale image, I must lament the inability to produce a decent black & white (NOT grayscale) pdf. The workaround of converting to a 300dpi "tiff" file still works of course, but the loss of resolution is very noticeable.
Outside of Photoshop, I'm not aware of a solution to this yet, but at least grayscale is fine.
IS there a way to only convert certain pages? I noticed when you select preflight only pages the analyze and fix option goes away. Also how do you get to this forum from the Adobe Forums page? I had to google the question and find the forum that way. Otherwise on the main site I keep getting redirected to a non support forum.
Is there a way to convert specific pages?
Somewhat of a kludge, but extract the pages you want to convert as a separate PDF file. Convert them to grayscale with Preflight. Then import them back into the original PDF file and delete the color versions of those pages.
I tried all of these options, but none of them worked. What worked for me to get a monochrome image (black and white, no grey) was the following:
1. Open the PDF in Photoshop in RGB mode
2. Use the Image->Adjustments->Black and White and set all the values to -200
3. Adjust the levels with Image->Adjustments->Levels and drag the leftmost slider all the way to the right.
4. Save as Photoshop PDF