You can create a dial and "teach it" your morph. There's a short tutorial/walkthrough in the Poser manual on how to create dial-controlled morphs and joint control morphs and other dependent morphs. It's pretty straightforward, once you get the hang of it.

Check for hidden dials using Scenefixer. Click on the body part, go to Scripts -> Scenefixer ->Dials and highlight the dials you wish displayed, then click on "Apply changes." Note that the "translate" dials don't have to be named "x trans" (Etc). And, you can also change the origin (center) as well.