Adding post type support for specific features from other plugins.
Some third party themes or plugins have features that can be added to custom post types, but the support needs to be done at the point of post type registration. Custom Post Type UI has had an extra field option to allow providing custom "supports" elements since version 1.1.0.
Genesis SEO and archives features
If you are a Genesis theme user, then you may want to add SEO settings and archives support for your custom post types. To do so, you should provide the following two items in the custom "supports" field for each post type you want supported:
Once entered, save your post type. After that, the post types should receive support for the features.
Yet Another Related Posts Plugin
The "Yet Another Related Posts Plugin", or "YARPP" for short has built in support with Custom Post Type UI, though is handled differently than above. You will still enter the support for it the same way, but internal code associates the intended support in the proper way so you don't have to worry about it.
To add YARPP support for the post type, simply add "yarpp" to the custom supports field.
If you want to add support for the Jetpack's publicize module simply add 'publicize' to the custom supports field. More information about Publicize support can be found at https://jetpack.com/support/publicize/
If you want to add support for the Jetpack's markdown module simply add 'wpcom-markdown' to the custom supports field. More information about Markdown support can be found at https://jetpack.com/support/markdown/
If you know of any other plugins that have feature support handled this way, let us know and we can get them added to the list.