several methods you can use to create a hatch that does not display
a hatch boundary.
You can create a hatch with HATCH, and then erase some or all
of the boundary objects.
You can create a hatch with HATCH, making sure that the
boundary objects are on a different layer than the hatch. Then turn
off or freeze the layer of the boundary objects. This is the only
method that maintains hatch associativity.
You can trim an existing hatch with objects created as trim
boundaries. After trimming the hatch, erase the objects.
You can define a hatch boundary with the Draw option of
-HATCH at the command
prompt by specifying boundary points.
you might want to show that a large area of a drawing is filled
with a pattern by filling only a small section of that area, as
shown in the following illustration.
You can choose
whether to retain the polyline boundary after the hatch is created;
here, the polyline boundary is not retained.