Enter Latitude and Longitude limits of your area. Entries must be between 90.0 and -90.0 latitude and between -180 and +180 longitude. To enter longitude span of 0 to 360, simply enter 0 for both longitudes.
Click on the Default button to re-set the entries. This generally will reset the boundaries to the entire world (latitude -90 to 90 and longitude -180 to 180).