I was at a customer’s office the other day helping to set up their new Mac system. It was a busy construction company and they needed help getting wireless scanning operational. I noticed that they were using Adobe Reader for their PDF files, so I introduced them to Preview. Once I set the Finder to open PDF files with Preview instead of Reader, I showed them how to access the scanner to scan documents right from Preview.
As I had them practice this, I noticed that much of their scanning needs were for documents that they would print out, sign, scan and then email to clients. When I showed them how to use the “signature” function in Preview they immediately saw the value and time saved. So, I know many of you already know how to use this tool, but I thought I would go over it so you too can use your electronic signature.
Preview is used to view and edit PDFs and images, import images from a camera, import documents and images from a scanner, add pages to a PDF and also to take screen shots. When you have a PDF that needs your signature, the old way of doing this would be to print out the PDF, sign it, scan it and send it back. With Preview you can skip some of that work. You can capture your signature using your trackpad or better yet, using your camera on your Mac.
To create your signature you can simply click on the Sign button on the Markup Toolbar, select Manage Signatures to create a new signature. Or you can go to Tools > Annotate > Signature > Manage Signatures. When you select Create Signature you have a choice of trackpad or camera. While signing on your trackpad is okay, I prefer the camera method. Here you take a white piece of paper and sign it. Then click on Camera as the means of capturing your signature and hold up that piece of paper to the camera on your Mac. Once you align the signature on the blue line you can hit Done and your signature is stored. If you don’t like the first try, click Clear and do over.
To add your signature to a PDF document click on the Sign button 
or use the path Tools > Annotate > Signature to select the signature. Once it has been placed on the document you can drag it to where you want it, then use the handles to adjust its size. Save the document and you can include it in an email with your signature. Remember that the Save As command is sort of hidden now but to get to it simply hold down the Option key when you select File.