If you want to display large photo’s you can do this the best on a page that uses a template without sidebars. In this case you have more space and can display large photos.
In the next example the slideshow is shown.
It depends on your settings in the Photo Albums -> Settings admin page whether the slideshow starts running, or it starts in the ‘browse full-size images’ mode.
This is the text in the post that generates the photo display: