To edit the Template, go to "Template" [1] and check the "Edit Template" [2] box.
Once you finish editing the template [1], click on "Close Template" [3], or click again the "Edit Template" [2] box. Both methods go back to first page of your site.
Any element that is inserted in "Template mode" will be visible throughout the entire site.
You can also add a "Favicon", a favicon is a special icon associated with your website, displayed in the browser's address bar.