I'd like to add a Featured image to a default article or a Custom Type Post in my theme but I don't get the area of the highlight image, why? In the default theme the option is present but not in my theme, what have I missed?
You need to add theme support in the
To enable it within a custom post type, you will need to do so when registering your post type with the
If you see the last line of the
See the Codex for more information:
For adding thumbnail support: http://codex.wordpress.org/Post_Thumbnails
For registering post types: http://codex.wordpress.org/Function_Reference/register_post_type
Or more specifically, a complete example with thumbnails added to a custom post type is here: