As a test you could just put the following in the Configure Header Area box.
%logo %pages %cats %image
This will put your logo at the top, then the page manu, then the category meny, then the banner image.
This will probably not be what you want but you should see the RSS icon.
The options you have are a matter of what you want to do. It's just using the proper CSS. If you look at the Export/Import setting section you will see some text about other styles that come with Atahualpa that you could import as a starting point for design. That is another direction you could take but be aware if you import a style it will overwrite any styling you have applied so you should export your current setting as a backup.