No RGB channels option under the Tone curve in LR 4 beta ?

[Remko]

I recently downloaded LR 4 beta onto my Mac. Made a copy of a couple of photos and imported these into the LR 4 catalog.

For some reason I do not get the RGB channels in the Tone curve. I mean,  the RGB channels should be visible under the curve giving you the option to select one of these channels. But there are not there ..... any idea what I might be doing wrong ?

I checked and the photo is processed with PV 2012.

Cheers,
Remko

[Costas]

Its there on mine - immediately under the curve in the RGB drop down !

[RikkFlohr]

Have you clicked on the small square button in the lower right hand section of the panel to activate the Point Curve functionality?

[Remko]

Thanks, Rikk, I clicked on the little square button, like you suggested, and now I have the RGB channels !

Much appreciated :-)

cheers,
Remko

Edited: corrected a typo