Thanks for the answer.
if we talk about the same thing, (see screenshot), first I have no simplify option to display- it's all visible
second it seems that this changes the tabs in the surrounded area of red, not in the menus (contorted of green.)
no even clicking in the green area gives me no other option.
What's strange: my collegha has the option to view the simplify tab under measure, I do not.
It wasn't. I uploaded it and now go.
I tried to look at it first, but I was looking for it with the initial s and instead it's like "bim simplify".
I stopped looking because I wasn't sure it was an add-in to load. . .
Thank you very much for your help.