There are four rotary motion experiment files in the Logger Pro experiments folder:
Experiments / Probes & Sensors / Rotary Motion Sensor

You should choose the file that corresponds to the needs of your experiment. There are files configured both angular and linear experiments. The High and Low settings refer to the resolution that you get from the sensor. High is accurate to 0.25 degrees, Low is only accurate to 1 degree, but can be used at higher speeds.