#sp-player-gallery-8546 { margin: auto; } #sp-player-gallery-8546 .gallery-item { float: left; margin-top: 10px; text-align: center; width: 33%; } #sp-player-gallery-8546 img { border-width: 1px; border-style: solid; } #sp-player-gallery-8546 .gallery-caption { margin-left: 0; } /* see gallery_shortcode() in wp-includes/media.php */