With the new update you now have the possibility to switch between theme templates or create your own theme template:
Set your colors for primary elements (such as submit button) and base elements (such as options and inputs), either manually for each color type or auto generated to help you get a nice palette quickly.
Set your background color and/or background image for each slide (slot).
Set your custom font and font color.
Set your layout default for each slide (slot) - Gap (space that flows between all modules), Padding top and bottom for each slide (slot), Padding left and right for each slide (slot).
Set your module defaults - Background color and/or Background image, Padding, Border radius. Content position (top, center, bottom).