CDJ2000NXS & CDJ2000 : Display Lights

Hello there !

Here's a very silly question :

How can i dim all lights off the cdj 2000 nexus & cdj 2000 when using them (Basicaly make them look like they are turned off :p )?
Is it also possible to set the 4 buttons on the left of the display-screen not to be enlightened when using the cdj's ?

Thank you very muchfor your help :D !