I just got a PDF agreement emailed to me that needs my signature, but I do not have a printer or scanner. How can I sign it directly on my laptop and send it back?
Easiest way is the free Adobe Acrobat Reader. Open the file, hit Fill and Sign, and you can draw your signature with the trackpad and place it on the page. On a Mac, Preview does the same thing through the Markup toolbar. I sign stuff this way all the time, no printer needed.