Quote - Totally. I have the Library window opened inline within the mat room screen, because I load and save material presets in and out of the Library when I'm in the mat room...

The "plus" icon at the bottom of the Library interface will save the material currently selected in the mat room, this way.

If you click the plus sign in the Pose Room, then you get a prompt to select which material group, or groups, you want to save as your Library preset.

Is that what you mean Basicwiz? (have I explained what I mean reasonably?)

Exactly. And now I feel like an even bigger idiot because I never noticed the + at the bottom of the material collection on the library screen! I had always assumed (yeah, I know!) that if I tried to save it as a pose, then the pose would be saved with it. But the mtl collection will serve my needs perfectly!

THANK YOU!