You can even print it again to see a better-developed and clearer preview of the images. I personally prefer option #1 if I'm just trying this out. When setting up a new printer this was my favorite. If I want to flatten some PDF with all my images in a new file for testing, this option is still my top choice. How to Use the “Flatten PDF” button on the Adobe Acrobat Pro Page Layout Step 4 How to Flatten a PDF on a new computer · After you've printed your file in Acrobat Pro, go to your “Print Output” menu > Flatten PDF file”. If no option shows up, click the first one. How to Flatten All the Contents of a PDF in Adobe Acrobat — Shaun 1. Open the PDF in Acrobat 2. Go to page Layout> General→Page Layout 3. Click the ‥ button for the next button: PDF/X‑3200‐ in the drop-down menu 4.