Editor Main Toolbar Section: This is the main control center and it allows you to determine which of the other three sections you intend to edit.  You can also edit your keywords and administer your email accounts from this screen.

Editor Banner Section: This is a representation of how your actual website's banner section appears.  Although it appears to be all part of one page, the banner is separate from the other two sections of your web page.  This is how it is able to always be on top even when you look at different web pages or websites.

Editor Contents Section: This is a representation of how your actual website's contents section appears.  Although it seems to be all part of one page, the contents section is separate from the other two sections of your web page.  This is how it is able to stay on the left even when you look at different pages or websites.

Editor Main Section: This is a representation of how your actual website's main page section appears.  Although it seems to be all part of one page, the main section is separate from the other two sections of your web page.  As you surf through the website, this is the area where most of the web pages appear.