Open the PDF in Acrobat and select the hamburger meu
(Windows) or File menu (macOS) > Save as other > Press-ready PDF (PDF/ X).Standard PDFs are not print-ready. They may have poor quality images and colors, which may not print correctly or print at a very low quality. You can use Acrobat Pro to create high-resolution print-ready PDFs from your standard PDFs.
Adobe recommends creating a high-resolution print-ready PDF directly from the source application.
Steps:
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In the Save As dialog box, select Settings.
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In the Preflight dialog, select Save as PDF/X-4 and select OK
Märkus.You can select the available PDF/X-4 conversion profiles listed in the Create PDF/X-4 according to the following PDF/X-4 conversion profile section, and Apply corrections as per your requirement.