The animated 'gif' file seen above demonstrates controls used to get Full Screen photo displays.
The 'expand'/'contract' features are for computer based displays - the features do NOT appear on hand held devices.
What you see changes! A 'click' is highlighted and the next image (seen in about 5 seconds) shows the effects.
It takes about 30 seconds for one pass through the entire set. Then it repeats.
Use "Close" whenever you want.