In version 22.2, Photoshop uses for single channels and masks. If you are working with grayscale or specific paper-ink spreads (dot gain), you can adjust these in Edit > Color Settings . Gray Gamma 2.2 : Matches Adobe RGB. sGray : Matches sRGB. Neutral Grey Layer Mask Fill Not 50% Brightness | Community
Note: Some filters require cloud download and Adobe account login. Adobe Photoshop 2021 -Version 22.2-