I need to change the theme's pre-installed banner. In the stylesheet area, there's a note that says:
You need to make this file writable before you can save your changes. See the Codex for more information.
I read the Codex and in the said article it says:
In a WordPress install, two files that you will probably want to alter are the index page, and the css which controls the layout.
I already changed index.php to 666. But I can't find print.css (screen shot). Does changing the file permission of print.css to 666 help me change the theme's banner? If so, where can I find it?