In the event a digital document needs to be signed, like a form or a letter, macOS includes a way to add your signature without needing to print out the pages and rescan them.

Filling out an online form and need an electronic signature ? No need to stress. This simple trick allows you to sign digitally without printing or scanning anything. E-signatures are secure and ...

Google Docs' drawing tool can be used to add a signature to your document, but it's more secure to use an add-on, like DocuSign or HelloSign.