Formatting Submenus

I am a fairly new user to blocs [don’t code] and need to create a menu/submenu header. It appears to me that with use of this default Bloc menu, I cannot format the font size, spacing, etc.

Is there a way to customize this? And as a second options, is there a way to create a text box with pull down/drop down that can act as a menu item for navigation?

Thanks