V4 body morph on separate body parts

Hi there !
Is there any way to get some body morph on selected body parts, like "Body builder" on legs only.
I used this kind of selected body partmorph previously with v4.2, but it seems that the option diseappeared now...
Same thing with leg scaling, few time ago I was able to scale the leg on a single axis (Y), but it seems impossible now.
Any idea ?
Comments
Make sure "Show Hidden Parameters" is ticked in the options menu (rectangle with horizontal lines in the upper corner).