Contextual Help support has been added throughout TunerStudio. Anywhere you see a , you can view help instructions added by the firmware developers in a tooltip by holding the mouse over it. If you click on the a yellow box like above is displayed for easier reading.
Note: As the vast majority of settings are specific to your firmware, TunerStudio only contains Context help for core fields. Most Contextual help is part of the firmware definition, so the level of available contextual help is best in current firmwares. James Murray has included very complete Contextual help in the MS3 1.3 ecu Definition files.