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When using the Haochen CAD drawing software to create drawings, chamfers and fillets are often needed. Below, we will provide a detailed introduction to the shortcut commands for working with chamfers in CAD! Taking the simple card slot that has been drawn as an example, the detailed steps will be explained below: The CAD chamfer command allows two non-parallel line objects to be connected using a slant line; the objects that can be connected include straight line segments, bidirectionally infinite lines, rays, and polylines. The following methods can be used to activate the CAD chamfer command: (1) Enter CHAMFER directly in the command window ； (2) Click the menu bar’s [Modify] - [Chamfer] button ； (3) Select the Bevel command in the Modify toolbar ； (4) Select the [Modify] - [Chamfer] command in the default palette ； Specific steps for drawing card slots: 1. In the HaoChen CAD software, select [Default] - [Layers] - [Graphic Properties]. In the Layer Properties Manager, create two new layers as well as a layer for labels that are not to be printed. (1) Name the first layer as the “Thick Solid Line” layer, set the line width to “0.30mm”, and leave all other properties at their default values. (2) Name the second layer as the “Center Line” layer, set its color to red, the line style to CENTER, and leave the other properties at their default values. 2. Set the current layer as the “center line” layer and start drawing the center line. Execute the [Line] command to draw two lines with endpoint coordinates {（3,11），（19,11）} and {（11,3），（11,19）} respectively. 3. Execute the [Graphic Properties] command, set the current layer to a \"thick solid line\" layer, select [Draw] - [Circle] command to draw a circle. With the intersection point of the two center lines as the center, draw a circle with a radius of 5. 4. Click on 【Draw】-【Rectangle】 to draw a rectangle, with its corner coordinates being (0,0) and (65,65) respectively ； Then click on 【Draw】-【Line】 to draw a line, with endpoint coordinates at (0,21), (@45,0), (@0,36) and (@-45,0). The following image is obtained: 5. Click on 【Modify】-【Trim】 to trim the shape, resulting in the image below: 6. Click on 【Modify】-【Chamfer】 to apply a chamfering operation to the corners of the slot. The size of the chamfer is 10; the commands displayed in the command window are as follows: 7. The resulting drawing is shown in the figure below. 8. Execute the [Chamfer] command again, set the chamfer distance to 5, and apply chamfers to the other corner points of the slot, resulting in the figure below. 9. Click [Modify] – [Copy], select the circle and the center line as the objects to be copied, and move them 42 units to the right; the commands displayed in the command window are as follows. 10. The final shape of the slot is as shown in the figure below. By following these steps, a simple slot can be drawn; the specific colors and line styles can be modified further if desired. The chamfering command allows the connections between parts to meet regulatory requirements. The above are the tips for using the CAD shortcut key commands for chamfering in the HaoChen CAD drawing software when creating slot designs; I hope this will be helpful to everyone!