After clicking one of the portfolios flashplayer opens a screen with images and the next symbols:
The left symbol means: toggle to full screen and back to split screen.
The next symbols mean respectively:
- previous picture
- start/stop slideshow (try full screen first)
- next picture

In Explorer F11 toggles between full screen and normal screen.

For optimal result first go to full screen in flash player and then use F11 to use the whole screen.

More details on: technical information.