Reorder among siblings
Use the up and down arrows next to a page. The new order appears in the public sidebar immediately for published pages.
Move to another parent
Choose Move…, pick the new parent (or top level) and the position. A page cannot be moved under itself or one of its own children.
What happens to URLs
Moving a page changes its path, for example from /guides/install to /setup/install. NextDocs records a redirect from the old path, so existing links and bookmarks keep working.