This is perhaps #400 in my list of posts which can be boiled down into one sentence:
MAKE CUBASE MORE SELF-EVIDENT OR AT THE VERY LEAST, DOCUMENT IT BETTER!
Cubase does everything except deliver pizza, but this is the kind of detail that can drive one nuts.
Suggestion to SB: Several apps have a dedicated page for resetting all such dialogue boxes in one go. (Adobe comes to mind. I think Wavelab has it as well?)