How to disable the Wireless Remote Ready Light

[scottparker50]

I am using 600EX-RT speedlites off camera controlled by the ST-E3-RT Transmitter.  How do I disable the Wireless Remote Ready Light that is flashing red on the front of the speedlites when they are in slave mode?

I have already used C.Fn-08 to disable(1) the AF assist beam but that did not resolve the issue.

Hoping that someone has a better solution that the gaffers tape I am about to apply to the speedlights.

Thank you

[diverhank]

Did you try setting this option? Set it to 1

[scottparker50]

Thank you Diverhank.  That worked.  I'm guessing that by the time I had read that far down the list my brain had shut off...