Note that if you share a page from a subtree, the reader will see its parents as well, but not siblings. I.e. a b b2 <- if you share this, 'b' is

Note that if you share a page from a subtree, the reader will see its parents as well, but not siblings. I.e. a b b2 <- if you share this, 'b' is visible, but 'a' isn't