Roberts Radio ColourStream ユーザーズマニュアル

The brightness of the display can be adjusted for when the radio is in 
Standby and for when it is in use. If you use the unit in the bedroom, you 
may prefer a lower standby brightness level than the standard setting. 

From the home menu press the Settings mode  button.The 
main settings menu will be displayed.

Scroll through the menu and select Miscellaneous Settings and select 
Display backlight.

To adjust the display brightness when the radio is switched on, adjust 
'Power on backlight'.

To adjust the display brightness when the radio is in standby, adjust 
'Standby backlight'.

Settings

Either use the Left or Right arrows or touch the slider  
to adjust the backlight level. The display will change as 
you adjust the levels.