You can add hatching to an area enclosed by entities selected to form the hatch boundary. The entire hatch is treated as a single entity. After you draw a hatch, it is independent of the entity itself.
You can also use an existing entity to define the area you want to hatch. You can associate the hatch with its boundary entities by selecting Associative from the Hatch Attributes area of the Hatch dialog box
Do one of the following:
Tell me about...
Selecting an area for hatching
Using islands and island detection
How do I...
Specify a predefined hatch pattern