We get documents in PDF format from the government or other agencies. Some documents come with digital signatures placed on the pages. If they are already validated, we see a Signature Valid message ...

Digital signatures are used to verify that electronic messages and data have come from the proper sender and to irrevocably certify that data was not tampered with or changed during transition from ...

When you receive a PDF document by email that you must sign, the process of printing out the file, signing on the dotted line with a pen, scanning the signed document and sending it back can be a ...

There are some rarely known about, but incredibly useful Paint-style tools available in Preview, macOS’s built-in image viewer. And as of macOS Mojave, these tools are now available when you use Quick ...