Every picture or photo added to digital art gallery is assigned with a set of tags, so you could create your own custom gallery to view with Slideshow Player basing on these tags. You can also simply review interesting themes as thumbnails.
By default pictures and photos are ordered by rating (descending). However, you can view pictures and photos by the date of adding to the digital art gallery. Simply change the RATING parameter in the URL to CREATED. You can also replace the DESC parameter by ASC to change the order of sorting. Example /picture/gallery/girl/1/CREATED/DESC/16