What KQ said :) 

Tehre are two ways of achieving what you want, at least as far as I know. First, and best is to simply pose the two things alike, you can use the Pose dots to "remember" the pose and reapply it to the conforming thing.

Or you could conform it to an invisible COPY of whatever you're conforming it to and move that. In both cases it will require posing the other thing like the original.

It would be a little easier to help if we knew what exactly you're conforming to what :) Are we talking hair?  clothes? Chains? Handguns? Jewellery? Each may have a better/alternative way of doing what you want :)

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You just can't put the words "Poserites" and "happy" in the same sentence - didn't you know that? LaurieA
  Using Poser since 2002. Currently at Version 11.1 - Win 10.