No worries, it is a bit confusing because it also cycles through the older optical wireless Master and Slave options too, so there are five settings. You can change that in P.Fn-06 from both Radio and Optical, to just one or the other, that is on page 102.
I am sorry but I l am still missing something. I can turn on wireless control and also in manual mode. But I still can not find the button which changes the flash from master to slave???
Exactly, once it is a Slave it is controlled by the Master. The display won't change until you either take a picture or test fire the setup, then the screen will reflect the last images settings as set by the Master, not the next ones.
OK, Thanks for your Patients. What I needed to do is do a test flash from the master and then the flash will change from ETTL/Slave to Manual/Slave to match the master. !!!!!