Autodesk AUTOCAD 2006, Command Reference Manual, Page: 529 / 1490

Retain Boundaries
Creates boundary objects from the temporary hatch boundaries and adds
them to the drawing.
Use Current Origin
Uses the current hatch origin setting
Use Source Hatch Origin
Uses the hatch origin of the source hatch
The Normal, Outer, and Ignore options are also available from a shortcut
menu by right-clicking in the drawing area while you specify points or select
objects to define your boundaries.
Boundary Retention
Specifies whether to retain boundaries as objects, and determines the object
type applied to those objects.
Boundary Set
Defines the set of objects analyzed when defining a boundary from a specified
point. The selected boundary set has no effect when you use Select Objects
to define a boundary.
By default, when you use the Add: Pick Point option to define a boundary,
HATCH analyzes all objects in the current viewport extents. By redefining the
boundary set, you can disregard certain objects when defining boundaries
without having to hide or remove those objects. For large drawings, redefining
the boundary set can also produce the boundary faster because HATCH
examines fewer objects.
Gap Tolerance
Sets the maximum size of gaps that can be ignored when objects are used as
a hatch boundary. The default value, 0, specifies that the objects must enclose
the area with no gaps.
Enter a value, in drawing units, from 0 to 5000 to set the maximum size of
gaps that can be ignored when the objects serve as a hatch boundary. Any
Hatch and Gradient Dialog Box | 505