Close the Preflight dialog. Go to PDF Optimizer tab. · 6. Turn on the PDF Optimizer—Flatten annotations and form fields”. · 7. Click the cleanup” button. The file flattens on your disk. · 8. Delete unused elements from your document. Aug 17, 2023 — You can also use “Copy to Clipboard” feature in Adobe Acrobat DC. 1. Click on the print button in Acrobat and select “Copy the PDF to clipboard”. 2. In Acrobat, go to print Production. 3. Use this feature to flatten the PDF. What is a 'Flatten' in Acrobat Pro It is a method to flatten an interactive document or file in Adobe Acrobat Pro by automatically merging selected text, images and other content into a single PDF page that can be printed at normal (or high) density. What is a 'Dismissed' in Acrobat Pro In Acrobat Pro and in other tools, when a document or file is edited at the same time a 'Dismissed' is displayed. When this document/file is dropped in the trash, a 'Dismiss' button is displayed. After it is dismissed, the file cannot be edited again. Some Acrobat users say that once this button is displayed, their PDFs cannot be changed at all. This happens whether the reader is on screen or not and in all versions of Acrobat.