AllProWebTools provides theme functionality so that you can create website content for different pages that will all have a similar look and feel. They will all share the same fonts, colors, header, and footer. They will also all have a menubar across the top so that website visitors can easily navigate between the webpages on your AllProWebTools website.
If you want to create a landing page that does not have the menubar and standard header and footer, you can turn the theme off on a page per page basis. This will allow you also to customize the head and footer (if any) that you use on a "no theme" webpage.
The following video is about removing the AllProWebTools menubar, but it also goes into detail on how the "no theme" button works:
You can access the custom Header and Footer from the main menu in your AllProWebTools account by going to "Settings" -> "Administrator" and then clicking either the "no theme header" or "no theme footer" in the "Theme Editor" on the left side of the screen.