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 [1] at "Move page" [2].
Here you have 2 sets of options, move up [3] or move down [4], and move up a level [5] or move down a level[6].
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 [1] and move it where you want [2].