Creating CSS Styles with any version of Expression Web is done by opening the Style Builder.
How to open the style builder:
Click 'New Style' which is located in the Manage Styles Task Pane (Panel).

This is the Manage Styles Task Pane. The orange arrow is pointing to "New Style".
CSS Styles can be applied in
3
different ways:
1. The most ideal way is with an External Style Sheet.
2. You can also use Internal or Embedded Styles
3. Lastly, and the least desirable choice, is the Inline Style.
Before creating styles, read about the Style Declaration. The Style Declaration is a Style.