Autogroup editor is an older program but still does a good job. I has a 3d display, can transfer groups from a donor, and then you can tweak them as you want. You can also create your own groups. The interface and mouse are a bit different but easier to get used to.

https://www.renderosity.com/mod/bcs/autogroup-editor---the-advanced-group-editor-for-poser-clothes-modelers/21081/