b116d9ce_ltimodal_Interaction_Use_Cases__Event_Handler
[User Action/External Input] User selects option to change volume of on-board unit using touch display. [Action on Device] N/A [Event Description] Touch_screen_event (includes x, y coordinates) [Resulting Action] Volume indicator changes on screen. Volume of speech output is changed [Event Handler] 
Touch screen detects and processes input
Multimodal Interaction Use Cases