This dialog allows you to edit a region.  You may do any of the
following:
	1. "Draw" your region with the mouse, in the white area.
	2. Enter the coordinates of your region in the text fields.
	3. Overlay a grid on the region
	4. Select the origin of the grid
	5. Change the color of the grid
	6. Fetch a region from a saved region file
	7. Save your region to a file
	8. Instantly set your region to the default region
