It is best to view the slideshow at the distance of 80-100cm
from the monitor, with monitor’s brightness and contrast set to
50%.
Do not try to make the sound loud: it is only a background for
viewing the slides.
You can control the playback and navigate through the slideshow
using the keys Home, End, PageUp, PageDown, Pause, Esc, arrow
keys, or with the help of menu in the right-down corner of the
screen (move the mouse to make the menu appear).