The QR Code (the square graphic with black and white dots in it) on each label make it easy to open a larger version of the puzzle on your phone, tablet or laptop.
To pull up a larger image of your puzzle - simply open your camera app and point your phone's camera lens at the code. Within a few seconds you'll be prompted to open a page (which corresponds with the puzzle your working on) in your web browser.
For Apple (iOS) and Samsung (Android) there's no need to download an app or use any external software. QR Code reading apps are available but not necessary.