Wordpress Add theme support function

 Use this function theme functions.php files. then add your necessary code for theme support.

function carnewstheme_support(){

//add theme support that you need, such as below.

add_theme_support( 'title-tag' );

add_theme_support( 'post-thumbnails' );

}

add_action( "after_setup_theme", "carnewstheme_support" );