You can customize quickly the style to see how your text appears using the Style Editor, apply formatting options to the text and see how it looks like. When you have done, simply drag away the formatted text into the destination word processor application like Pages or Text Edit.
If you are a professional designer with thousand of different fonts, you can search them using their family names or associated tags. Tags are useful to create groups and give to a style a meaning according to your work. Installing the Automator Service, you can put a selected text into the application by right clicking on the selection and choose the ‘Open selected text in Font Studio‘.