Reduces image resolution by averaging.
AVGI sarea darea lres eres [keyword]
The area size cannot exceed 26000 elements.
AVGI 12 15
This entry averages area 12 by one line and element and places the new area in area 15.
AVGI 10 20 4
This entry blows down area 10 four times by averaging pixel values. The new area number is 20.