1. After opening the drawing in Chen Hao CAD, enter the shortcut key command for CAD filling at the command line: HATCH, and press enter to confirm.

2. After executing this command, you can enter the dialog box of pattern filling and gradient color, where you can set the filling type, pattern and color, and then choose the method of adding the boundary.

3. There are two methods to add boundaries in Chen Hao CAD software, namely, picking points and selecting objects.

(1) Pick the interior point.

(2) Select the object

4. After selecting the graphics to be filled, double-click Enter or the space bar to complete the filling.