When selecting multiple channels and applying tone curves, the channel display in the Curves panel is strange. For example, if you select Cyan and Yellow, the Curves panel displays "CMK". (Attached image) Since the instructions work on the specified version, only the display is in a strange state. Could this be a bug?
I've never used it like this, but the notation is certainly strange. Cyan Yellow → CMY Magenta Yellow → CYK CYAN BLACK → CM Magenta Black → CY It was like that. We win10 PhotoShop 2022 ver23.5.3 and PhotoShop 2023 ver24.0.1