Scrivener – Creating a Theme, Downloading a Theme and Importing a Theme

HOW TO CHANGE SCRIVENER'S DEFAULT THEME:

The first thing you need to do is click on File => Options.  It's down at the bottom of the options list under the File Tab.  There is a picture to the right.

This will open a dialogue box.  Choose the Appearances Tab.  You can see it in the second picture above.