Page nesting for a child of a content-only page

Hi,

I have the following structure in my content tree : -- Root (master page) ---- Page 1(menu item page type) ------ Page 2 (custom page type) -------- Page 3 (content-only page type) ---------- Page 4 (custom page type)

I'd like to have the page 4 nested into the root page. In its template I did set the 'Page nesting' field to Specific content tree levels (level 0) . However, when I preview/edit page 4, the ancestor page content isn't displayed - so I wondered if it was possible at all to do page nesting for children of a content-only page? Moreover, when I move page 4 wherever, page nesting then correctly works.

Thanks!

Canelle

EDIT: that's actually not possible, out of design.