One of the issues when you have many different types of adjustability on a kiosk is how you make it easy to provide for all these adjustments without filling the screen with lots of buttons and dials.
One strategy is to have simple gestures on the screen (e.g., running your finger from the top to the bottom edge of the screen) be used to activate particular features. Although there may be a number of different gestures for the different features, any one individual would only have to remember the couple of gestures that they used.
A single button or pressing the access button could take an individual to a screen which would explain the various features. They could then pick the feature(s) they were interested in and see what the activation for that feature was.
Pro: This allows individuals to turn the features on and off or to adjust them at any time and on any screen while using the kiosk.
Con: It is not clear at this time whether people making random gestures on the screen might cause the kiosk to do strange things that they would have trouble getting out of. Two approaches to minimize this would be: