You receive a PDF document and spot a typo, need to add your signature, or want to fill out a form—but clicking on the text does nothing. PDFs are designed to preserve documents exactly as created, making them notoriously difficult to modify. Unlike editable Word documents, PDFs lock content into fixed positions, turning what should be simple text changes into frustrating challenges. PDF editing tools solve this problem by allowing you to modify text, add images, fill forms, and make changes to documents that would otherwise be unchangeable. This guide explains everything you need to know about editing PDF files in clear, practical terms. You'll learn why PDFs are hard to edit, what types of edits are possible, common problems you'll encounter, security considerations for sensitive documents, and when editing makes sense versus recreating from the original source. What is PDF Editing? PDF editing is the process of modifying content within a Portable Document Format (PDF) file—c...