You can use hatching to fill an area with a selected pattern or color. You can create a wipeout object to blank out an area.
You create a hatch by selecting an object to hatch or fill, or by defining a boundary and then specifying an internal point.
You can use a predefined hatch pattern or solid fill, or you can create your own hatch patterns.
You can modify both the pattern fill and the boundaries of hatches.
Wipeout objects cover existing objects with a blank area to make room for notes or to mask details.
in the Customization Guide