1. From the System Dashboard, click on the orange Control Panel tab.
2. Click the Page that you would like to edit.
3. In the upper left hand side of the Control Panel, click on the Page Settings icon.
4. Update the spelling in the Title field.
5 - Save your changes.
You will notice changes to the Title field will both update in the Control Panel - Page Tree and the Navigation (if this page is listed in the navigation).
Please keep in mind, if you have internal or external pages linking to your page you have renamed, you MUST change the links.