How to undelete a web page

Go to My Websites -> Main -> Pages -> Edit Web Pages. Near the bottom of the page click to list your deleted web pages.

In your deleted pages list, click to "Edit" the page you wish to undelete.

Near the top of the settings, uncheck the two Delete checkboxes

The page will now be reinstated into your web pages and will be available for normal editing from Control Panel > My Web Site > Edit Web Pages