You'll find this feature in a host of Apple apps and some third-party apps that tap into the same system-level feature. The set of images is loaded by Preview as a single document best saved as a PDF. Your iPhone or iPad will capture images continuously as it finds paper boundaries until you tap Save. Scan Documents recognizes rectangles that appear to be paper documents or photographs, and works best when capturing these against a high-contrast backdrop.If you select the latter, the photo is transferred to your Mac and opened in Preview. After you tap the shutter button, you have the options Retake and Use Photo. Take Photo lets you capture a single image.Launch Preview and choose File > Import from iPhone > Take Photo or Scan Documents. It's easiest to demonstrate in the built-in Preview app. You can perform powerful tricks in transforming paper to bits with your iPhone by itself, using software like Adobe Scan, JotNot Pro, PDFPen, or Evernote—or even Apple's Notes app.īut you can save a step and use a bigger screen for editing and other tasks by selecting an option you might not have known existed. Your iPhone is often the best camera you have with you, and it's also the best scanner for your Mac.