Awesome job is it possible to have predefined specing features and perhaps a layout as well for instance if I need a specific layout, font , order , certain UI

Awesome job is it possible to have predefined specing features and perhaps a layout as well for instance if I need a specific layout, font , order , certain UI elements it could be for accessibilitys' sake or preference , can you make the internal code used for app creation be configurable insuring security of course.