How to add and update the CSS directly
You can add, edit or delete any style declaration directly within the CSS editor. Click the Edit CSS button to open it.
If your a whiz at CSS, or even a novice, you can still get your hands dirty by editing the CSS directly. Just click the Edit CSS link in the header (top right) to open it. You can add your own advanced CSS declarations, or just remove effects by deleting style declarations. As you are designing in the browser, your changes are immediately applied in the canvas.
You can add as much as you want in here, including fallback fonts so you have a robust font stack. Note: You cannot add @font-face declarations, which are not supported at the moment.