Creates Regions. Regions are usually used to mark an area on the map and they are used for many different purposes.
To modify an existing region, select it from the list. The corners of the region will be highlighted. You can only resize a region by dragging the corners. Left click+drag the corners of the region to resize it. When finished, click "Apply".
Some regions cause special behavior during gameplay based on what you name them. For example, naming a region "
TODO: List all special region names.