Hi,
its unfortunately not possible to customize the generated layout manually, its a fairly complex process that requires server side code generation to generate the layout on the fly. The eye icon was available in a very early beta of the editor but was removed in the final version of the editor. The layout might not look the same due to overriding of objects, try to have a look in your form that no object (questions, html, behaviors, tables etc...) space (you can see the object space when you click on it) is overriding any other object space otherwise FS will try to re-arrange the layout the best it can to remove the overrides.