@ac cobra 427: If I check "no hatching", I have of course my dimension which is perfectly visible, but I no longer have hatching, which, for a cross-sectional view, is not great. So by rechecking hatching, the problem comes back.
@.PL: Apparently, my graphics card supports SW (image CF)
I don't know if the drivers were up to date, but now they are and it doesn't change anything.
@aurélien FIVES: Yes, the problem persists after printing, that's why I want to fix it, because I'd like to print a map that can be read by the guys at fab.
it's a hack but remove them as I said before then you go to annotation and you do Hatched Area/Fill . And you select region and there they go to the chosen place.