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1. Make full use of command code: Use text editing software (such as WordPad, Word under Windows) to open the ACAD.PGP file in the ACADR14\SUPPORT directory (Note: The content described in this article takes version 14 as an example), you can see the following content: ; acad.pgp - External Command and Command Alias definitions ………… ; overboard on systems with tight memory. A, *ARC C, *CIRCLE CP, *COPY DV, *DVIEW E, *ERASE L, *LINE ......... The one with "*" is the full name of the command, and the letter in front is the code (also called the abbreviation) of the command. For example, you only need to enter "Command": ”Then type "L" to use the Line command, and type "C" to execute the Circle command. Being familiar with these codes can improve drawing efficiency. We can also give the codes of some commonly used commands according to the format of the file according to our own needs to facilitate drawing, such as adding "Q, *OFFSET", and put the code in the left-hand key position as much as possible, so that the left hand hits the keyboard and the right hand operates the mouse, so as to better coordinate the work. 2. Flexibly use the automatic capture drawing function: In "Command: ”In the state, without typing or selecting any command, when you click directly on the object you want to process (such as a line, arc, circle, polygon, etc.), several small blue boxes (called grips) will appear on the object. When a certain grip is clicked, the grip is activated and the color changes to solid red (the color and box size can be adjusted by the ddgrips command), and at the same time "Command: ”The **STRETCH** command status appears under the command. If you press Enter continuously, **MOVE****, **ROTATE****, **SCALE**, etc. may appear. ＊＊MIRROR＊＊Four states (or press ST, MO, RO, SC, MI), in each state you can execute the corresponding command, which is called the automatic capture drawing function. Flexible use of the automatic capture drawing function can * * To improve drawing efficiency, two examples are as follows:: (1) See Figure 1. To change Figure 1a into Figure 1b, you can use the following method: first click on the straight line 1 and the straight line 2 to make the pinch points appear, click on the P1 point to activate it, move the mouse to the vicinity of the P2 point, the point will be automatically captured, and click. (2) See Figure 2. To draw line 2, line 3, and line 4 from line 1, the following method can be used: Click line 1 to make a grip point appear, activate grip point P, enter to **ROTATE**** state, type "C" (Copy, rotate copy), press enter, type "30", press enter, type "70", press enter, type "120", press enter, then line 2, line 3, and line 4 are drawn. Press "Ctrl+C" or "Esc" to exit the automatic drawing function. 3. When you need to locate a point relative to other points during the drawing process, you can use the Tracing function. For example, to draw a circle in the center of a rectangle, you can use the following method to position the center of the rectangle: First turn on the automatic capture function, type the circle command, and you will be prompted to enter the center position of the circle. At this time, hold down the shift key and right-click the mouse, select Tracking from the pop-up shortcut menu, and then move the mouse near the midpoint of the bottom edge of the rectangle. When a triangular box representing the midpoint appears, click to capture the point, and then move the mouse up and to the right near the right midpoint of the rectangle. Similarly, when a triangular box representing the midpoint appears, click the mouse. After pressing Enter, the center of the circle will be positioned at the center of the rectangle, and then enter the corresponding radius. 4. In R14, a new dialog box based on the Windows Explorer interface is introduced for layer and line management, which has a card-like structure. Users can not only complete all management operations through it, but also sort by name, color and status with a few mouse clicks. In R14, if you want to change the layer, line type, color and other properties of certain objects, it is easier and simpler. You only need to directly select the object whose properties you want to change, then select the corresponding property content in the Object Properties toolbar, and press Enter to complete the property change. In addition, there is a Match Properties function in R14 (similar to the format painter in Word). Select Match Properties from the Modify drop-down menu, click on the object with the required properties, then select the objects whose properties you want to change, and press Enter to change the properties of these objects to the properties of the object you clicked for the first time. 5. Cut or extend multiple entities at the same time. In the drawing and design process, the extend and cut commands are frequently used. Sometimes you may need to cut or extend multiple entities at the same time. In this case, you can use the F fence selection method (Fence), that is, prompt in the status line“/…: ”or“/…: ”When , type "F", press Enter, specify the starting point, several intermediate points and end points of the fence line, press Enter to confirm, then all entities that intersect with the fence line will be cut or extended. 6. Optimize the settings of the toolbar. In AutoCADR14, a large number of toolbars are provided, which bring convenience to our drawing work. However, a large number of toolbars accumulated on the screen will reduce the visible area of drawing. In order to solve this contradiction, users can customize toolbars according to their own needs and concentrate frequently used tools on several toolbars. The specific steps are as follows: (1) Right-click any tool button to display the Toolbars dialog box. (2) Select "New" to display the New Toolbar dialog box. Enter the name of the new toolbar, such as "my", and press "OK" to return. At this time, a blank "my" toolbar is displayed at the top of the screen. (3) Select "Customize" in the Toolbars dialog box to display the "Customize" dialog box. Select the toolbar name of the desired category from "Categories" and the corresponding tool button will be displayed below. (4) Use the left mouse button to click and drag the required tool button to the "my" toolbar, and then let go. (5) Repeat steps 3 and 4 to customize your own toolbar. If the tool button that has been dragged to "my" is no longer needed, click and drag it with the left mouse button outside the "my" toolbar in step 3 and release the mouse to eliminate it. After customizing, use the mouse to move the toolbar to the appropriate position on the screen. (6) If you right-click on a tool button again after step 1, the Button Properties dialog box will appear. From this dialog box, you can modify the tool name (Name), help information (Help), macro command (Macro) and pattern (select Edit) of the button. In this way, the user can make a certain command into a tool button according to his own wishes to facilitate his use.