Nixeus NX-VUE30 User Manual page 11

The ECO settings have 4 preset brightness/contrast settings - STANDARD, GAME, MOVIE, and TEXT.
1) In the BRIGHTNESS Sub-Menu, use the UP/DOWN buttons to navigate to ECO and press the MENU button.
2) Then use the VOL+/VOL- buttons to cycle through and select either STANDARD, GAME, TEXT, and MOVIE mode.
Please note when you select GAME, TEXT, or MOVIE as the setting - you will not be able to manually customize the
BRIGHTNESS and CONTRAST settings (These settings are grayed out).