Mitel 5304 - How do you adjust brightness?

[PeterNicholls]

Hello all,

I have some Mitel 5304's in a hospitality setting and we need to either turn off the back-lit display or adjust the brightness of them.

Tried hunting for feature codes and also the settings on the phones. Nothing.

Let me know with any ideas.

Thanks,

Pete.

 

[sunspark]

Add superkey.