To get started, do the following:
1. For first time users, take off the cap of your Apple Pencil and plug it into the lightning connector on your iPad Pro.
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3. That's it! You can start writing and sketching on Noteshelf from here on. If you want to disconnect the Apple Pencil, just go to your iPad Pro's Settings > Bluetooth then tap "Forget This Device." You won't be able to write using Apple Pencil on Noteshelf after this.