Webshots is divided up into different sections.

• The top toolbar with Settings (gear icon) and Help (? icon) on the right side
• The second toolbar with buttons for showing photos (house icon) and playlists (list icon)
• The left pane which shows the categories of the photos displayed
• And the right pane with photos

To start, click on the "Make Wallpaper" button now to set a photo as a wallpaper.

You should now see that photo on your desktop.