If you understand how to use CSS classes and styles, you can customise the appearance of your menu items.
Note: these are advanced features that can be used, but it's recommended that you don't unless you know what you're doing.
Predefined CSS classes (if you know them) can be typed into the MENU ITEM CLASS/ES box, separated by a single space.
MENU ITEM STYLES allows you to enter style properties for the specific menu item. For example, if you wanted to set the text to be green, you would enter the following:
color:green;