Change fontsize for maincopy textblock under masthead

I recently am migrating my workflow from TTG CS4 to Backlight 3, but I can’t seem to find a way to make the fontsize of the maincopy textblock under the masthead of my fotogalleries smaller for my clients. In CS3 and CS4 I could use a smaller size…
Here an example:


Is there a way?

You can change the main copy font size with custom css. See this post: