From my understanding, either you want to make your hand-written signature into a PDF file OR you want to insert your signature into a PDF. Here’s my answer for the first version. 1. Change your scanner settings first and make sure that the output is PDF. Do this by going to your computer’s devices then select the scanner. 2. Change the profile setting (either photo or document can be selected). Choose document to save it as a PDF file. 3. Create your signature on a paper, put it on the device and click scan. When done, you will notice that it’s already scanned as a PDF file. Note. On some scanners, you don’t need to go to the computer devices as the software that comes with the scanner often has an option for JPG / PDF shown before scanning. The second version, where you insert your signature into a PDF was answered and can be found from this thread. How do I do a digital signature in PDF? Please note, you can’t scan your signature and automatically place it on a document already. There are specific steps to be taken, which were given different answers from various people.
I'll go in a little more detail, by showing you steps I’ve gone through myself on getting a digital signature. So, here's the first version, with my own signature inserted into a PDF. Now on to the second version. 1. Now we need to tell Adobe how to save our PDF signature as a PDF file. It's just the same process as changing the scanner profile. Change the profile, but still on the computers' device. 2. Now, when we want to get started, tell them where our signatures are. Go to the PDF settings and select the 'Scan PDF' option. The scanner name should show up at the top of the screen. 3. Now we need to change the PDF settings on our devices. Now you should see the settings change from a normal PDF preview to a more customized profile (like the one I had set up to show the signature. 4..