When the 912 iS is selected as the engine type, there are two additional widgets that you can place on the layout.
So basically, go to EMS SETUP> ENGINE INFORMATION> and verify that ENGINE TYPE is set to "ROTAX 912iS".
Next, go to EMS SETUP> SCREEN LAYOUT EDITOR> and select one of the layout pages. Press the SENSOR button and scroll down to "THRTL PERCENT (CAN)" and press ACCEPT. Select a style and size for your Throttle Position widget and place it somewhere on your EMS display page. Press SAVE. Note: You'll need to edit each of the EMS pages (20% page, 50% page, etc) individually to add the Throttle Position widget. There is also a widget for Power/Eco mode.
The "Start Assist" feature is incorporated into the colored range markings on the Throttle Position widget. The color markings dynamically change to match the starting conditions specified by Rotax for the current environment (I believe OAT, more or less).