HONDA 2015 Civic Si Coupe - Owner's Manual - Manual (Page 209)

uu Audio System Basic Operation u Playing a Video Using the HDMI®
208
Features
1. Select Settings to go to the Settings
screen.
2. Select Audio.
3. Select Aspect Ratio Adjustment.
4. Select the setting you want.
5. Select OK.
■ Changing the Screen Aspect 1 Playing a Video Using the HDMI®
This feature is limited while driving. To play videos,
stop your vehicle and apply the parking brake.