The Hide Left button hides the Contents Pane providing a larger video window. There is no full screen playback available.
The Space Bar will pause/depause file playback, and mute/unmute internet stream playback.
The Mouse wheel will adjust volume.
The CD-DVD, Dvd Navigation drop down menu item provides DVD navigation options when a DVD Movie is playing. Some navigation options may not always be available as they are enabled by the authors of the DVD. DVD navigation is not available when playing VTS_xx_xx.VOB movie part files.