Manifest Yourself!
Creating a page is very easy. It is done simply by clicking "New page" in the editor menu.
Type in a name for your new page, e.g. "My photos", in the window that appears.
In this window you can also choose whether a page is to be visible in the menu - by default each newly added page will be visible in all the menus on the site.
Right after adding a new page you will be redirected to it. Now you can add to it any elements you want...