View troubles

Hello Everyone.

I picked “Visual Theme” by Devin Price. I’m a graphic designer and that theme is suitable for me. Here is the problem: I created my own front page as backside picture. I’m using 24′ monitor so looks perfect but I saw at my client’s office on his 15′ laptop display the front image is half cut off. Why cannot theme be adjusted automatically if display is smaller picture is smaller? It’s all about proportion. I’d like to get some advice about that issue. Thanks. My page: http://ninanart.wordpress.com/