This is an old revision of the document!
Now lets go to Admin→Home > Site Manager > Themes Manager > Create a New Theme (See image) and fill the fields there shown. The only really important fields are the name and the based on, but it doesnt hurt to fill in the others too.
After that, the theme is created and all theme's files will be auto generated.
Example: Lets fill the fields like this:
At this point we have a theme and source files for template. Now lets go to the source file and check at root/app/View/Themed/Mytheme and root/app/webroot/theme/mytheme
All available themes are stored in View > Themed
A theme contains views of the modules which you want to change the way they look. When a theme is being used, its views will be used instead of the default ones.
It is unnecessary to create all views for a theme, just create views you want to change. Views is not available in a theme will be loaded from default.
default.ctp: This template file defines the general layout for all pages (header, footer, main content, etc…)