Follow these steps to restructure your pages:
Go to the Sitemap.
Click on the icon of the page you want to move but don't release the mouse button.
You can now drag the item around and change its position by dropping it between two other sitemap items.
If you drop the item on top of another page, the following dialog shows up:
Instead of just being able to resort to your page, this dialog allows you to create an alias—a second URL for your page—as well as make copies of pages including its children.