Defines the object type, boundary set, and island detection method for creating a region or polyline using a specified point within an area enclosed by objects.
BOUNDARY (Command)
Tool Set:

List of Options
The following options are displayed.
Pick Points
Determines a boundary from existing objects that form an enclosed area around the specified point.
Boundary Retention
Defines the type of boundary object that will be created from the enclosed area and how enclosed areas are detected.
- Object Type
-
Controls the type of the new boundary object. boundary creates the boundary as a region or a polyline object.
- Retain Boundaries
- Controls whether the objects created are retained after the dialog box is closed.
- Island Detection
- Controls whether boundary detects internal closed boundaries, called islands.
Boundary Set
Defines the set of objects boundary analyzes when defining a boundary from a specified point.
- Current Viewport
-
Defines the boundary set from everything in the current viewport extents. Selecting this option discards any current boundary set.
- New
-
Prompts you to select the objects that define the boundary set. boundary includes only the objects that can be used to create a region or closed polyline when it constructs the new boundary set.