No Opacity of the Luminosity Mask?

OS: Windows 11
Software: DxO FilmPack 8 / PhotoLab 8 (Latest Build)

I must be doing something wrong…I must be. How do I change the opacity of a luminosity mask? I notice that I lose the mask, changing the opacity any amount and must delete it and create a new mask.

I asked the AI for assistance, which led me back here again.

Thank you in advance.

By the way, I am demoing this. I only own PL9 and Nik 8 as of May 2026.

In PhotoLab 9.8.1.679 (and the same thing in PL 8) →

For FilmPack 8 I can’t help you.
FP 7 Standalone has a problem →