You can digitally sign a PDF in several different ways, including Adobe Acrobat, Apple's Preview app, and mobile apps, among other options.
To password protect a PDF in Adobe Acrobat Reader, you'll need the paid Pro version, which starts at $14.99 a month.
WhatsApp’s built-in document scanner lets you digitize paper documents into PDFs directly from a chat on Android or iPhone, ...
An Etsy printables business has the potential for high profit margins. You create items once—like works of digital art, ...