A stylesheet defines all the properties and design conventions used to draw a map. Each map layer has a stylesheet associated with it which determines its appearance.
The stylesheet defines:
The predefined styles, and any additional user-defined styles.
The markers used to identify map details.
The textures available for use as textures for regions.
One or more default lights for the map layer.
Additional properties of the map including land shadow, relief, and line widths.
Once created, a finished project can be changed to a different set of design conventions simply by loading in a different stylesheet.
The above project was created using the default stylesheet. The project can then be instantly converted to a totally different house style simply by loading in a different stylesheet.
One stylesheet could include texturing and lighting effects.
For another project loading a stylesheet could create a much simpler appearance with flat lighting and thick line widths.
Multiple Stylesheets
If your project includes more than one map layer you can apply a different stylesheet to each map layer. For example you might have one house style for the main map in a project and another house style for an inset map.