How to create a signature for PDF documents on a Mac

These days, hard copy paperwork is fast becoming the exception rather than the rule, and more and more official papers are being turned into PDF documents. (PDF stands for Portable Document Format; it is a standard created by Adobe in the early 1990s that allows paper documents to be turned into exact digital copies.) However, even digital documents have to be signed. You can do it the long way — print those documents out, sign them, and then scan them back into your computer — or you can create a digital signature and place it directly on the PDF.

If you’re using a Mac, the process is refreshingly easy — just use the built-in Preview app to create and save your digital signature. (If you’re using a Windows PC, unfortunately, it’s not quite as simple.) After that, when you open a PDF using Preview, it will be a simple matter of dropping the signature into the document.

To create your signature, you first have to have a PDF ready:

Click on the Signature icon to create your signature via trackpad, camera, or phone.

Now, you can create your signature. (If you’ve already created at least one signature, click on the “Create Signature” button.) You will have either two or three buttons on top of the window. Here are your choices:

With any of these methods, if you need to try again, just hit the “Clear” button on the lower left of the window to get rid of the unwanted signature. Once you’re happy with it, click on “Done.”

Now, whenever you want to add your signature to a document in Preview, just click on the Signature icon and click on your signature. It will appear in a box on your document, which you can then use to adjust the size and location.

And if you want a second or third signature, just create them in the same way. After that, when you click the Signature icon, you’ll see all your created signatures and can select the one you want to use. Don’t need one of the signatures anymore? Hover over the signature until you see a small “x” next to it, and click on that to delete it.

Update November 2nd, 2021, 11:30AM ET: This article was originally published on March 10th, 2020; some minor updates have been made.

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