One thing to note is that you will want to add an initial class before adding the utility classes outlined below. Otherwise, you will begin editing the utility class itself. For instance, the text color classes have the class "Example Text" this protects the utility classes from being overwritten. It also helps to keep clarity in the Navigator. Of course this means that you can also edit or create your own utility classes as well. To do this, you can drag an empty div into the designer & add the utility class. When you have a class isolated like this, any styling changes that you make will apply to the class.