ID:260871
 
It would be rather nice if the CSS editor for members taller, I have to say I feel rather constricted using that pretty small view..
Click on the CSS box.

Ctrl+A

Followed by opening notepad, or other text editing program, then:

Ctrl+V

Problem solved!

I actually recommend Notepad++ for editing the CSS since I started using it when I revamped my site and it works really well.
In response to Foomer (#1)
For someone like myself constant copy and pasting for every little detail I'd like to preview is honestly a painful hassle.