This window contains a list of time zone with official name and time bias.
When you let the mouse cursor on a zone, information related to the zone
pop up indicating if time zone is subject to daylight time or not.
Time zone checked generate a clock on the wallpaper.
A clock is define with the following parameters:
Caption to display under selected clock
Position (Top / Bottom)
Position of clock
Offset from left
Number of pixels (from left) where clock is displayed
Press OK to validated your modification or Cancel otherwise.