Help Changing print from white to black on Cruz T301

[psweat]

My Cruz T301 has white print on a black background. I would like to reverse that and can't find out how to get it done. Can anyone help? I use the Cruz strictly as an ereader and I love it, but the white print is not good for me. Thanks.

 

[Hadron]

Which ereader application do you use? Most I've tried have this as a option - white text on a dark background is often called "night mode", in which case turning that off would revert to dark text on a light background.