Edit PDFs With Preview
Preview is a program pre-installed to your Mac that can open and edit PDFs. It’s about as extensive as any other PDF editor with the exception that it can’t edit pre-existing text. However, it has the added benefit that you don’t have to install anything extra to use it—just open the PDF and start editing right away. It might make sense to think that the Edit menu is what you use to find all the PDF editing tools in Preview, but that’s not the case. Instead, this menu is for deleting pages from the PDF and inserting pages from other PDFs (or making blank pages). Preview also lets you rearrange pages in the PDF by dragging them up or down from the sidebar. What that means is that you can make the second page the first page, or the last one the second, etc. If you don’t see the sidebar in Preview, you can enable it from the View menu.
Preview Editing Tools
Most of the other PDF editing options in Preview are in the Tools menu. It’s there that you can add a bookmark to the PDF or rotate pages. The Tools > Annotate menu is how you highlight text; underline text; strikethrough text, insert a note, rectangle, oval, line, arrow, and other shapes; type on the PDF (anywhere or in form fields); use speech bubbles; and more. While Preview doesn’t let you edit existing text in the PDF file, you can draw a white box over the text to hide it and then write your own text on top of the box with the text tool. This isn’t as smooth as text editing is with some PDF editors, but it’s your only option for changing the text in a PDF file with Preview.
Add a Signature in Preview
So long as you have a trackpad or iSight camera attached to your Mac, you can also use Preview to insert your signature into the PDF. There’s also a freehand drawing tool available so that you can draw your signature or draw shapes directly on the document.
Make New PDFs From Old PDFs
Although it doesn’t really count as a PDF editing ability, one bonus feature in Preview is the option to make new PDFs out of existing pages from another PDF. To do that, just drag a page from the document (in the sidebar thumbnail view) to the desktop. This will make a new PDF with just that one page in it (or multiple pages if you selected more than one). Another easier way to do this is to right-click the thumbnails of the pages and select Export As and then PDF as the format type.
Other PDF Editors for Mac
If the features in Preview aren’t what you’re looking for, there’s a really good chance that you’ll find them in another PDF editor, one not built-in to macOS. We keep a list of free PDF editors, and most of them work on Macs, too. Another way to edit a PDF in macOS is to use an online PDF editor. Through that list linked above are several of these kinds of services. They work by having you upload the PDF to the editing website where you can perform the edits and then download the PDF back to your computer.
Problems With PDF Editors
In a perfect world, a PDF editor would let you perform various actions on the PDF file. These actions could include adding shapes and signatures, as well as editing or adding text to the document. However, not all PDF editors offer all of these features, including Mac’s Preview program, which does not allow for text editing. Another problem with PDF editors is that they rely on a technology called optical character recognition (OCR) to enable advanced features such as text editing. OCR attempts to “read” and automatically transcribe the text in the document, but the result is often imperfect and may have incorrect translations or strange formatting. As a result, editing the PDF can be challenging.
