We have been studying CSS using site like http://www.csszengarden.com/.
I am wondering what type of graphics tool they use to create those stunning back ground images?
Do they draw them originally or use existing images and just alter them to fit the site?
Where can I learn more information on creating / modifying those back ground images.
Thanks for reading my question.
Thanks for the answer regarding PhotoShop. I have been reviewing videos on Lynda.com. What videos do I need to review to learn on how to work on those back ground images?