I don't understand how to use this. There seems to be no explanation. To try to use it, I open "Manage Bookmarks", then click Alt+1`- nothing happens. I am told it functions like "parent folder", but I cannot see how the two are related. That parent folder-like function is not actually what brought me here, but to try to over-ride the very much unwanted way "Manage Bookmarks" now opens at "other bookmarks".

It would be helpful to have a simple explanation of how this is supposed to work.