This plugin integrates an extended version of PhotoSwipe to WordPress. All linked images in a post or page will be displayed using PhotoSwipe, regardless if they are part of a gallery or single images. Just make sure that you link the image or gallery directly to the media and not the attachment page (in galleries the option link=file should be set). More about the original version of PhotoSwipe see here: http://photoswipe.com The version of PhotoSwipe provided with this plugin comes with a number of modifications and extensions. See the FAQ for details.