Hatched areas created with BHATCH are associative by default. Associative means the pattern is updated when you change the boundary. You can remove hatch associativity at any time or use HATCH to create a nonassociative hatch. AutoCAD LT removes associativity if editing creates an open boundary.
Any whole or partial objects that are not part of the object boundary are ignored. If a hatch line encounters a text, attribute, shape, or solid-fill object, and if the object is selected as part of the boundary set, AutoCAD LT hatches around the object. Therefore, if you draw a pie slice, label it with text, and hatch it, the text remains readable. To hatch through the text object, use the Ignore style.
You can hatch them or leave them unhatched. Enclosed areas within the hatch area are referred to as islands.
Due to the many combinations of geometry that can be hatched, editing hatched geometry can produce unexpected results. If you create a hatch that you don't want, you can undo it or you can delete the hatch block and rehatch the area.