Missing Option To Set Featured Image

Your theme does not supporting featured image so please add this code in your theme function.php file

function themeimage_setup() {

        add_theme_support( 'post-thumbnails' );
        set_post_thumbnail_size( 825, 510, true );
}

add_action( 'after_setup_theme', 'themeimage_setup' );

Thanks

Thanks for the quick reply.

The theme supports featured image for posts and pages but wasn’t for testimonial post types.

Added the code above to functions.php and its working now for testimonials also.

Thanks.