Hi sammie,
Press on the right upper bar of the screen to [setup] then on the left side on [show settings] in the middle of you're screen wil come-up a field, in the right down side you find "[-] xx% [+]" in this field, you set the percentages of the external (3p xlr on the back side) desklight. 0%=off, 100%max.
Below this you see "[ Backlight]" to press on this will turn off the baklight/keylights, or on indicated by a blue background.
Keep try..
Press on the right upper bar of the screen to [setup] then on the left side on [show settings] in the middle of you're screen wil come-up a field, in the right down side you find "[-] xx% [+]" in this field, you set the percentages of the external (3p xlr on the back side) desklight. 0%=off, 100%max.
Below this you see "[ Backlight]" to press on this will turn off the baklight/keylights, or on indicated by a blue background.
Keep try..