In order to edit the  settings of a page, when logged in as an Administrator, it is necessary for you to click the Pages button in the drop down menu.
The following screen will appear, containing the name of the created pages:

 
Select the name of the page which has to be modified.
Click the  button in order to visualize the page settings.

Edit the settings and click Update.
In order to visualize the selected page click the  button.