Print to PDF is an easy way to preserve the information and layout of what you are currently viewing, saving a 1:1 digital copy of the documents and websites you use everyday. You don’t actually print anything, but the idea is that an exact replica of what would have appeared on paper, if you had sent a job to a real printer, is instead stored as a PDF file. A big advantage of Print to PDF, or Save to PDF as it is often known, is that it is available in a lot of apps by default. Apps don’t add pdf printer to ipad to support PDF output, they just have to support the normal printing features.
This means Save to PDF is widely available across many iOS apps, and even more Mac apps. The concept of Print to PDF began on the desktop and macOS exposes the feature relatively prominently. On iOS, the feature is harder to find. There isn’t an obvious button in the interface for it, but the capability is there — if a little hidden. Of course, if an app includes PDF export features natively, use those inbuilt features instead of the print to PDF workaround.
Pages, Numbers and Keynote include official features to save documents as PDF files, for example. More apps than you might think expose printing features, especially on iOS. Save to PDF’ functionality for free. Just looking at system apps, Apple includes Print functionality in Mail, Photos, Notes, Maps and Safari. On the Mac, printing is universally available.