ACTIVEAREA
Outputs the current active area, as set by SETACTIVEAREA.
The active area is output as a list of the form: [XLow YLow XHigh YHigh]. All members are integers.
SETACTIVEAREA [-10 -10 10 10] SHOW ACTIVEAREA [-10 -10 10 10]
SETACTIVEAREA [-10 -10 10 10] SHOW ACTIVEAREA