Adding a new page is easy, simply go to the bottom of the page preceding where you would want to add a new page.
i.e as you are looking at this screen on the left hand side where the page titles are to add a new page above the page titled "OUR CMS" you would go to the bottom of "HOME" page.
Then type in the name of the new page and highlight it.
From the editor choose Format then from the drop down Heading 1, Heading 2, Heading 3
To change a page name simply retype it and save, but pages linked to that page (see links) will not work and will need relinking.
As you are looking at this screen on the left hand side where the page titles are you can see that the page titles are displayed.
Heading 1's are main headings such as: HOME, OUR CMS, IMAGES
Heading 2's are secondary headings visable when the main heading is selected and include: Pages, Images, PDFs, Tables etc.
Heading 3's are subsidary to the heading 2
To change a heading 2 to a heading 1 or 3 simply highlight and choose which heading you want.
To delete a page
Go to page, click source, delete all code on the page, press save