Hi Curious,

Why not just use "Lock actor" on the "Object" menu?

Select the body part (bone) that you don't want to move and "Lock" it.

Oops, sorry ... changed my mind (it was getting dirty anyway) ... try using limits and then set the min and max to the same value.  This will prevent a bone from moving in one (or more) axis.

cheers,
dr geep
;=]

Remember ... "With Poser, all things are possible, and poseable!"

cheers,

dr geep ... :o]

edited 10/5/2019