I've one custom menu e.g. "About" and under that I have two pages "X" and "Y". So when I go to page "X", I see "You are here: Home -> X". However, I should see "Your are Here: Home -> About -> X". When I try to add parent for page "X" in Page Attributes, I don't see option "About" because "About" is not a page (it is just custom menu).