Step 1: Install Office Lens on your device, run the app, then give it permission to access your camera.
Step 2: The default 'view' in the app is a live camera viewfinder. Choose one of the three available image types from: Photo, Document or Whiteboard, then point the camera at whatever you want to capture.
Step 3: For documents and whiteboards, you will see the app attempt to automatically frame the image as you move around. Once the frame properly covers the area you want, tap the shutter button. NB. If your document has a table in it, the frame might hang around the table, if this happens, move the lens further away.
Step 4: Once the image is processed, Office Lens gives you a preview of it. If the image needs cropping, tap the Crop icon in the top-right corner. You can also add typed text or freehand text by clicking the icons in the top-right view.
Once you're done and ready to save the image, tap 'Done'.
Step 5: Now choose where you are going to save your image. This can either be your photo library or If it's OneNote, you'll first need to sign into your account (a one-time step). Then you can give the image a title and choose the notebook in which to file it. Alternately, Office Lens can export to your OneDrive account, or to Word or PowerPoint (whether or not you have the associated apps on your device). Other export options include PDF, e-mail and your photo library.
After you've exported your file, you'll find yourself back at the viewfinder, ready to scan again.