Apply the flattening. Click apply. Apr 30, 2023 — A good technique used by many of my readers is to make a copy of the whole PDF. Go to the 'Home' tab on the top toolbar, hit Print > “Print”. It will flatten a large PDF file in a matter of seconds. Then you can view the full PDF. Use a program to Flatten PDFs in Adobe Acrobat 1. Download and install the right PDF viewer for your operating system. Download and install a PDF viewer with: 2. Copy all pages of the PDF to the Desktop 2. Go to File > Save PDF as 3. Click next The Reader Has Changed May 12, 2023 — As the reader changes, it can cause problems with flattening PDFs. Here is how to flatten a PDF when the Reader Has Changed: 1. Open the PDF in the PDF reader. 2. Press CTRL + E (on Windows) + P (on Mac) → Print 4. Now, you want to flatten the PDF. You don't need to use any special steps. Just click on the Flatten button in the toolbar. You can use the slider in the PDF preview if needed. Why I Choose to Flatten PDF in Adobe Acrobat For more information see: How to Save an Unclosed PDF to My PC If you are going to use Adobe DC Comics or Acrobat DC Comics, you should flatten and print these: 1. Download PDF Viewer from the Adobe website. 2. Make a copy of the PDF and paste it on your PC. 3. Open the PDF and click on the PDF viewer in the Applications > Adobe Digital Editions > PDF Viewer. 4. In the PDF viewer, in the left panel, there will be two buttons. One button will open the PDF viewer window. The other button will flatten the PDF. 5. Click on the button to flatten the PDF. If you are using PDF reader with other formats of Adobe PDF, you should not flatten the PDF. A PDF Reader without Raster/Vector Blend Mode If you are using Adobe DC Comics, but need to flatten and print to other Adobe products like Adobe Acrobat, you will need to use Adobe Acrobat DC Comics Reader without Raster/Vector Blend Mode. I prefer Adobe Reader 6 DC Comics Viewer without Raster/Vector Blend Mode.