2 The CSS file, yourtheme.css, is an exact copy of xtheme-blue.css. Feel free to edit the images inside the yourtheme image directory to build your custom theme--just remember to update your background-image file paths in yourtheme.css.
5 ext-all.css contains all of the other css files combined and stripped of comments (except themes).
git.ithinksw.org / extjs.git / blob