Bernard, could you expand on what you said… that's interesting!
OK, I understand what you meant.Yes, the behaviour of the Black and Shadow sliders in C1 is quite different from what it is in Lightroom.
In LR the Black and White sliders are used to set the Black and White point. In C1 you use the Levels tool, as in most image editors. LR does not have Levels capability, hence the need for dedicated slidersYou can automate the Levels tool in C1 which speeds things up as for normal images you normally want to set the Black and White points early on in the edit process.