When organising subpage, there are several options in the selection, depending on where you want the page to appear. If you then go, along with other pages for a table of contents, it is best to go to the organization page and go under Menu Links and select add content and link group.

A Link Group page must be named and you can click Add Link and include the name of the page to be placed there, and enter the urn on the subpage being located. Make sure you set the correct prefix in front of the page, make sure you set it for the Icelandic /s/institution/slug,

Then you must repeat it for childrens link, and make sure you do the same for both languages.

This is what the page looks like