How to edit PDF files: 1  Open a file in Acrobat. 2  Click on the Edit PDF tool in the right pane. 3  Click the text or image you wish to edit.  Add or edit text on the 1  page. Add, replace, move, or resize images on the page using selections from the Objects list.  Click on the Link, Headers and Footers, Watermark, or Background tool to edit your PDF further.