In some places, surveyors are legally required to show where a particular region ends and another begins. In order to do this, you can place a “mask” over the irregular area that defines the region in question. This mask is called an island. It is a solid layer with a hole that allows the region to show through.
You can define an island from polygon feature classes only. This includes normal polygon feature classes and area topologies (as they are polygon feature classes, too). For example, if you are designing a new development, you might define a feature class called DevelopmentPerimeter that defines an area topology based on the outline surrounding the development. You can then create an island based on the DevelopmentPerimeter feature.
For islands to show up properly on a plot, the System Administrator must define a draw order for the plot display model so that the islands lie on top of the features they are meant to cover.
To capture an island for a plot, you must first capture the map specified by the plot or template you are using.