Mask Out

Mask layer could be set to avoid drawing graphic outside the mask extent. Tick Is Maskout property, and then select a mask layer from Layer Name list. But firstly you have to have at least one mask layer in the project. Only polygon layer could be used as mask layer. china.shp file in Map folder under the software installation path can be used. Open it, and then select it in Layer Name list. Don’t use very complex polygon layer as mask layer, it will slow down the software obviously.