When processing PDF files, you may sometimes encounter situations where you need to add editing permissions to the PDF, but find that the file has been set to read-only and cannot be modified. At this point, you may feel confused and unsure how to solve this problem. This article will explain how to add editing permissions to PDFs in 2026 using native software and online tools. To determine the permission settings for a PDF file, first, you need to determine the permission setting type of the PDF file. There are two main types of permission settings for PDF files: …