Click the 'Edit' button beside the page you want to edit.
In the text boxes for 'Title' and 'Subtitle', enter your new title and subtitle for this page. Please note that creating a subtitle is optional.
Click on the green 'Save' button at the top right and bottom of the page.
NOTE: This will not change the title that appears in your menu. The title that you see on your page and the title in your menu can be different. This can be useful if you have a long title like "History of the Company" and then make the title in your menu "History".
To change the page name in your menu:
Click the 'Edit Site' tab.
Click 'Properties' beside the page that you would like to change the title for. This link will be in the 'Options' column.
Under the 'MAIN' tab, in the Page Name field, enter the name you would like to show on your menu.
Click the green 'Save' button at the bottom of this pop-up box.