Polygon Boolean Operations

Use the Polygon Boolean operations on the String Tools menu to combine two or more selected polygons. If you have no polygons (or only one polygon) selected, the Selection Assistant prompts you to select the polygons you want to operate on.

Icon	Description
	Union will return the union (Logical Or) of the selected polygons.
	Intersection will return the intersection (Logical AND) of the selected polygons.
	Cut is the new name for the old Polygon Difference. Cut will return the relative complement of the rest of the selected polygons with the first selected polygon. That is, the difference of the first polygon with respect to the rest.
	Difference will return the areas of the selected polygons that are unique to a single selected polygon. Therefore this will return the areas where polygons do not overlap.
	Split will return all the closed sections within the selected polygons, where each polygon does not overlap another polygon. You will be given the opportunity to interactively select which of the returned polygons to keep.
	Split All will return all the closed sections within the selected polygons. The output will appear the same as the input, but will be a new set of polygons where each polygon does not overlap another polygon.
	Union Exclude First is the relative complement of the first selected polygon with the rest of the selected polygons. That is, it will return the union of the rest of the selected polygons excluding any areas that intersect with the first selected polygon.
	Intersect All with First will return all closed sections within the first selected polygon created by the rest of the selected polygons. This is the same as performing Polygon Split and keeping only those polygons that are within the first selected polygon.
	Create Bounding Polygon is the smallest polygon that can encapsulate all of the selected polygons. This bounding polygon is created relative to the current viewing plane.
	Delete Original Strings. If you only want the polygons created as a result of the Boolean operation to be included in the display, select this option to delete the strings that were used to create the polygons.
	Only apply to Closed Strings. If this option is selected, boolean operations will only be applied to those strings (in the current selection) that are closed. Otherwise, all selected strings will be included in the Boolean operation. The function will temporarily close those strings in order to perform the Boolean operation.
	Choose Resulting Polygons. Select this option to add a final selection step which will prompt you to choose which of the resulting polygons to keep. If there is only one result, you will not be prompted.
	Select Options to specify how Polygon Boolean Options are applied.