3-10Garmin GTR 225/225A/225B Pilot’s Guide 190-01182-00 Rev. A3.3.2 Aux AudioThe Aux function allows you to turn Aux Audio On/Off and set the volumevalue.1. Press FUNC to access the Functions. Turn the LARGE knobto select the ICS Function. Turn the SMALL knob to view theAux Volume function. Then, press the ENT key.Figure 3-17 Select the Aux Audio Function2. Turn the SMALL knob to turn the Aux Audio On or Off.3. Turn the LARGE knob to select the Aux Volume. Turn theSMALL knob to set the value. Then, press the ENT key.Turn Small Knob To Turn Aux On/OffPress the ENT Key to Savethe Displayed Value Press the CLR Key To Revertto the Previous ValueTurn LARGE AndThen SMALL Knob ToAdjust Aux VolumeFigure 3-18 Adjust the Aux Audio4. Press the CLR key to revert to the previous Volume value andthen repeat step 3 to select a new value.