All images have tags associated with that image. These tags describe the major elements of the image. The tags are organised into categories.
To search for an image simply type a query into the search-box at the top left of the screen. Alternatively use the 'All' drop down menu to the right of the search-box. This menu is organised into categories and the corresponding tags.
Searches are made up of one or more tags. You can build up a list of tags, shown to the right of the search-box, to narrow down your search.
Clicking on a thumbnail sends you to a preview page of the image and with the tags linked to that image. Pressing a tag will launch a new search based on that tag.
Beneath the preview image are buttons for downloading the image, either the free 1600 pixel version or the high-resolution subscriber version. You also have the choice to share the image on various social networks.
You can add an image to your favourites by clicking on the star button.