When Apple added PDF support in iBooks, it was a huge boon to users who hadn’t yet sprung for a standalone, third-party reader. But did you know that you can add files directly to this PDF library from Safari on the iPad? Simply open a PDF in Safari and tap the page - at the top you’ll see a button to “Open in iBooks,” which will automatically add the document to your library. Starting in iOS 5, you’ll also be able to…
