ok, maybe it isn't as complicated as I have thought.
so here's part of the function with the array:
'wheel' => array(
'url' => '%s/images/headers/wheel.jpg',
'thumbnail_url' => '%s/images/headers/wheel-thumbnail.jpg',
/* translators: header image description */
'description' => __( 'Wheel', 'twentyeleven' )
Assuming I have copied the images I want to use in the images->headers folder in my child theme /public_html/andys/wp/wp-content/themes/twentyeleven-child/images/headers. Say I have 2 images: image1.jpg and image2.jpg.
How should I change the function to?
'wheel' => array( I guess I don't have to change 'wheel';
-the url, is the path the same, apart form the file name?
'url' => '%s/images/headers/image1.jpg',
-Same for the thumbnail?
-how about the description, does is stay the same?