You can move your page in more ways, you can move it up and down in your page list, or you can make it a child(subpag) from a parrent(page) and the other way around.
To move a page select the page and go to page option  at "Move page" .
Here you have 2 sets of options, move up  or move down , and move up a level  or move down a level.
You cand add subpages to other subpages making them sub-subpages and so on.
You can also move your pages with "drag and drop" option. To do that just hold left click on a page  and move it where you want .