I think that Cristina has a good answer and her illustration is the same for PSP2018. However, the reason I was asking about the specific commands you were using is that there have been some changes with some of them where you can see two panes (before and after) but only of the layer itself, making it hard to compare with other colors from other layers. And that has been reported as an “annoyance” (since it was by design). But I cannot remember which command it was affecting. Obviously, it was not the one you are listing, at least.