In these fields is defined the region to be displayed. The boundaries of the region are defined by northernmost and southernmost latitudes and upper and lower levels.
The latitudes are in degrees. The zero latitude is corresponding to the equator, positive values are in the Northern Hemisphere, negative values are in the Southern Hemisphere.
Vertical levels are in mbar in the range from 10mb to 1000mb. One can choose in the running window any two levels, then data laying between these two layers will be displayed.