Understanding WordPress’ post type support

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When you register post type, you can choose what support you need. For Example:

function codex_custom_init() {
    $args = array( 'public' => true, 'label' => 'Books', 'supports' => array( 'title', 'editor' ) );
    register_post_type( 'book', $args );
}
add_action( 'init', 'codex_custom_init' )

In this way you will create post type Books only with Title Option and Editor