A client needed a method to quickly input voltage reading into FileMaker Go on iPad and David Burton came up with this method of entering the data. The key was to not use the built in iOS keyboard, but rather provide on screen buttons that offer probably choices.
Before the video starts, David entered the nominal voltage on the left out of the view of the video which set the range of voltages from 488 to 509. Chances are, the voltage reading will be represented in the list of buttons. If not, buttons are provided to go back and forward. Worst case, the voltage can be entered manually by entering the numbers.