robwithamac on "Enlarging the Writing & Editing Window?"

Hello WordPress users!
Thank you in advance for your help with a question that could increase my productivity powerfully. How could I make the window in which I type a post larger? So that when I want to see how the post looks on an actual screen view, I don't have to keep going for the "preview".

Here's an image of the window I am talking about:
http://robertwangsblog.files.wordpress.com/2010/10/screen-shot-2010-10-03-at-4-16-24-am.png

Thanks again!