Ability to edit submenus individually

Sorry, I should’ve clarified about the image a little bit more. The image is just to show what it could look like to add icons in a menu and/or submenu. In regard to fonts and spacing: Currently, when changing fonts and spacing for a menu, it changes for both the menu and the submenu. It would be nice to have the ability to change them separately.
Example 1: Menu font = Times New Roman, 12 pt, 1.0 spacing between letters, 1.2 spacing between menu items.
Example 2: Submenu font = Cambria, 13 pt, 0.6 spacing between letters, 1.1 spacing between menu items.