Yongnuo flash - Optical Slave

[gadgeteer]

I have a Yn-565 & YN-568. According to the manual and the Internet, i can set them to be simple optical slaves. S1 or S2 mode. But I have no clue how to set this on the flash! I can't see anything in the manual either that helps!

Does anyone know how to do this?

Thanks

 

[ArronTucker]

On my YN560-II I just press the 'mode' button and it switches through M, S1, S2 and Multi

 

[gadgeteer]

Never mind...found it! You keep the zoom button held until the slave function comes on.