How to Reorder Wiki Pages
Go to Admin -> Wiki
Press the arrow to open the Wiki Pages.
By clicking the 3-lines symbol next to the title of the page (either parent or child page), it is possible to move a page in a different position by dragging and dropping.
When moving a parent page, all the child pages will follow.
When moving a page under another parent page, automatically it will inherit the restriction of the new parent page.
It is possible to edit every wiki page. Read more about editing here.