Summary of CAD Drawing Tips 1

Question: How to quickly switch layers? Answer: Click the “Make objects’ layer current” button on the “Object Properties” toolbar (the button on the far left of the toolbar), then select any object on the layer you want to switch to in the drawing area; the current layer will immediately change to the layer containing the selected object. Question: How to handle manually drawn drawings, especially those with many previously hand-drawn engineering sketches? Answer: Scanning the drawings into a computer might be a solution. But note that the graphics processed by AutoCAD are vector graphics, while scanned drawings result in raster graphics. Due to this difference in nature, although the graphic files generated from scanned drawings can be inserted into AutoCAD, they can only be viewed and not edited. There are also some vectorization tools that can convert raster images into vector images, but due to technical limitations, the efficiency and quality of such conversions are not satisfactory. The author has tried various such tools, and the results were disappointing. (If there’s time to do that, it’s better to redraw it.) Save Question: How can I reduce the file size? Answer: After the graphic is completed, use the PURGE command to remove unnecessary data, such as unused blocks, layers without entities, as well as unused line styles, fonts, and dimension styles. This can effectively reduce the file size. Generally, thorough cleaning requires PURGING two to three times. Additionally, by default, data is saved to R14 in append mode, which is faster. If disk space needs to be freed, the ISAVEPERCENT system variable must be set to 0 to disable this incremental saving feature, so that the file size is reduced upon the second save. Question: How to set up the auto-save feature? Answer: Set the variable SAVETIME to a smaller value, such as 10 (minutes). The default save time in AutoCAD is 120 minutes. Question: How to restore automatically saved graphics? Answer: AutoCAD saves automatically saved drawings in AUTO.SV$ or AUTO?.SV$ files. Find these files, rename them to the corresponding drawing file names, and they can be opened in AutoCAD. Generally, this file is stored in WINDOWS’ temporary directory, such as C:\WINDOWS\TEMP. Question: How can data be restored if an accidental save overwrites the original image? Answer: If it was saved only once, change the file with the BAK suffix to have a DWG suffix as soon as possible, and then open it in AutoCAD. If it is saved multiple times, the original image cannot be restored. Question: Why does the prompt appear in the command line instead of a Open or Export dialog box appearing? Answer: The AutoCAD system variable FILEDIA is used to control the display of the file list dialog boxes. Setting FILEDIA to 1 will cause these dialog boxes to appear; if FILEDIA is set to 0, you can still get a dialog box to show by entering a symbol “~” in response to the first prompt for the command you have selected. Of course, when calling a file operation command from a batch command or an AutoLISP/ADSRX/ObjectARX application, a command-line prompt is required, and no dialog box should appear. Question: Why isn’t the date and time of a file updated in the file browser when it is saved? Answer: Autodesk has identified this issue; it only occurs in the Win95B operating system, and it has never happened under Win95A or Windows NT. As a temporary solution, the system variable ISAVEPERCENT can be set to 0 in AutoCAD R14, causing AutoCAD to rewrite the entire drawing content every time it is saved. This may lengthen the saving time, but it ensures that the file date is updated correctly. Font question: Why can’t Chinese characters be displayed? Or did the entered Chinese characters turn into question marks? Answer: The reason may be: 1. The corresponding font does not use a Chinese character font, such as HZTXT.SHX, etc ； 2. There are no Chinese font files in the current system ； The shape files used should be copied to AutoCAD’s font directory (usually ...\FONTS\) ； 3. For certain symbols, such as Greek letters, the corresponding font file must also be used; otherwise, they will be displayed as ? Number. Question: How to resolve the issue of garbled Chinese characters when opening R12 files in R14? Answer: When using R14 to open an R12 file, garbled characters appear even if the Chinese font file is selected correctly, because R14 and R12 use different code pages, DWGPAGECODE. You can download the code page conversion tool wnewcp from AutoDesk’s homepage. After running wnewcp, first select the “R11/R12” checkbox, then click the “Browse” button to choose the file or directory to be converted. Next, select the new code page (ANSI) and click “Start Conversion” to begin the conversion. After the conversion, Chinese characters will be displayed correctly in R14. The code conversion tool DWGCODE.EXE provided by Tianzheng can also be used for code conversion. If these tools are not available, open the graphic file to be converted in the R12 environment, enter DWGCODEPAGE in COMMAND mode, change its value to ASCII, and then save the file. Batch modification can be achieved using the SCR command set file or through LISP programming. Question: Why can’t the height of the entered text be changed? Answer: When the height value of the font being used is not 0, the DTEXT command does not prompt for entering a height when writing text; as a result, the height of the text created in this way remains unchanged, including dimension labels created using that font.

Question: How to change an existing font format? Answer: If you want to change the size, font, aspect ratio, spacing, tilt angle, insertion point, etc., of existing text, it is best to use the “Properties (DDMODIFY)” command (provided that you have already defined various text formats). Click the “Properties” command, select the text you want to modify, press Enter, and the “Modify Text” window will appear; then choose the items you want to change to make the modifications. Question: Can system fonts be used, such as SimSun or KaiTi? Answer: Although ACADR14 can use *.TTF Chinese font files, such fonts consume a lot of CPU time; on computers with lower specifications, the display speed (such as when using the real-time scaling command) is extremely slow. It is recommended that computers with lower specifications use *.shx files. In Chinese character *.shx files, it is recommended to use the HZ*.shx font files provided by Daheng or Haochen for ACADR12; however, the absence of such fonts on different machines can cause issues with the display of Chinese characters. Of course, using the system font in small amounts for aesthetic purposes is also acceptable. Menu Question: Why are the button icons on the toolbar replaced by smiley faces? Answer: When AutoCAD cannot find the path to the button bitmap file, these button icons in the toolbar or toolbox will be replaced by a smiley face. This may occur after the toolbar has been customized, and the menu template file (MNU) has been edited manually. In this case, a text editor can be used to open the menu source file (MNS) and the menu template file (MNU). The customized toolbar section from the MNS file can be copied and pasted into the MNU file. Then, the old MNS, MNC, and MNR files can be renamed or deleted. Finally, the MNU file can be loaded using the MENU/MENULOAD command; AutoCAD will recompile the menu files, creating new MNS, MNC, and MNR files, thereby resolving the problem. Additionally, this issue can also occur if the bitmap file is not in AutoCAD’s supported paths. Please make sure that the support path in the “Preferences (System Settings)” dialog box includes the directory where the bitmap file is located. For example, if you move a button from a customized toolbar to a toolbar in AutoCAD’s standard menu, you must edit that button file so that the bitmap file is saved in a supported path. It can be done following these steps: 1. After moving or copying the icon to a different menu toolbar, keep the toolbar dialog box open, and right-click on the icon to edit it. 2. In the button properties dialog box, select the “Edit” button. 3. In the Button Editor dialog box, select the Save as button and specify a bitmap file directory on a path supported by AutoCAD. 4. Close the button editor, then select the Apply button in the button properties dialog box. Finally, close AutoCAD and restart it. Question: How to localize the menu? Answer: Under WIN95/98, use an editor such as Notepad to open the acad.mnu file in the support directory, change the English command names inside it to Chinese, save the file, and then exit. Then enter the “menu” command in R14 to load the acad.mnu menu file, and the drop-down menu will change to Chinese. If there is a already localized menu file, it can be used directly. Printing Question: Why do the PLOT and ASE commands only produce prompts in the command line, without any dialog boxes appearing? Answer: The AutoCAD system variable CMDDIA is used to control the display of dialog boxes for the PLOT command and the ASE command; setting CMDDIA to 1 will resolve the issue. Question: The quality of the printed image is very poor; there are differences in gray levels along the lines. Why? Answer: This situation is usually related to the configuration of the printer or plotter, its drivers, and the operating system. Generally, the problem can be solved by considering the following points. 1. When configuring a printer or plotter, is the error jitter switch turned off? ； 2. Are the drivers for the printer or plotter correct, and is an upgrade needed? ； 3. If AutoCAD is configured to output using the system printer, reconfigure it by using the ADI drivers provided by AutoCAD for various printers and plotters ； 4. For different models of printers or plotters, AutoCAD provides corresponding commands that allow for further detailed configuration. For example, for printer series that support the HPGL/2 language, the command “hpconfig” can be used” ； 5. In the AutoCAD Plot dialog box, set the correspondence between pen numbers and colors, line types, and pen widths ； Assign the same pen number to different colors (preferably 1), but the line style and pen width associated with that pen number can be different. Some inkjet printers can only support pen numbers from 1 to 16; if the pen number is too large, printing will not be possible ； 6. Is the pen width set too high, for example, greater than 1? ； 7. If the operating system is Windows NT, an updated NT patch package (Service Pack) may be required.

Question: After installing R14, there are no fonts available in MS WORD. What’s going on? Answer: The reason affecting the MS WORD font is related to a virtual printer called Phantom AutoCAD OLE/ADI, which is installed on R14 as part of the system. The Phantom AutoCAD OLE/ADI virtual printer enables R14 to print or draw raster graphics through the new ADI driver. In a typical R14 installation, this option is not included; this virtual printer is created only during a full or custom installation. Sometimes it is even set as the default system printer without any notification. Based on the \"what you see is what you get\" principle of Microsoft Office software, the font used in MS WORD documents is determined by the system’s default printer. In other words, the font displayed on the screen should be the same as or similar to the font used for printing. Windows first looks for a suitable screen display font based on the printer’s print font. If no matching font is found, or if the printer driver does not provide information on screen fonts, Windows will choose the screen font that is closest to the printer’s font. If the Phantom AutoCAD OLE/ADI virtual printer is set as the default system printer, MS WORD will only have two font options: modern and plotter. In the Windows system, by specifying the correct system printer as the default printer, the fonts in MS WORD can return to normal. If there are no other printers in the system, a Windows printer should be configured first in the \"Printer Settings\" – even a \"logical\" printer will do. One thing to keep in mind is that you must not modify the properties of the Phantom AutoCAD OLE/ADI virtual printer, nor should you delete it arbitrarily; otherwise, it will affect the output of raster graphics and OLE objects, and may even cause the system to crash. Question: Is batch printing possible? Answer: Method 1: First, output the graphics to a PLT file, and then use a batch file in DOS to print the PLT files in a specified directory in batches. Method 2: R14 has dedicated external functions that enable multiple graphic files to be sent to one or more printers or plotters, based on different printing configuration files, thereby achieving batch output of graphics. These two methods are more flexible, have fewer chances of errors, and are therefore more efficient. Select Batch Plot Utility in the AutoCAD program group. Question: The lines in AutoCAD drawings pasted into a Word document appear too thin when printed. What should I do? Answer: Cutting and pasting AutoCAD drawings into an MS Word document seems to work fairly well. But when the document is printed, those AutoCAD graphic lines become very thin, resulting in a poor appearance. We offer the following solutions to users: 1. Use the PostScript printing driver in AutoCAD to configure a PostScript printer. 2. If the background color in AutoCAD differs from that in MS Word, for example, the default background color in R14 is black, then it is necessary to first change AutoCAD’s background color to match that of MS Word. 3. Run the PLOT command and select to save the plot to a file. Set the brush width in the Brush Settings dialog box. 4. Start a new diagram and import this.eps file using the PSIN command. 5. Then cut and paste the graphic into MS Word. There is another method: in AutoCAD, convert the lines into PLINE lines, set the width, and then copy and paste them into WORD. Question: Why can some graphics be displayed but not printed? Answer: This situation occurs if the graphics are drawn on layers automatically created by AutoCAD (DEFPOINTS, ASHADE, etc.). Entities should be avoided on these layers. In ACAD, TIFF grayscale images with transparent backgrounds can be set to be transparent in CAD as well. Increasing memory can resolve printing and display issues. My computer has 768M of memory; I have used raster images of around 100M in size, and although the display is a bit slow, it’s still possible to use them. 1. Open the image in Photoshop, and from the menu bar select “Image” → “Mode” → “Grayscale”. 2. Once again, select “Image” → “Mode” → “Bitmap” from the menu bar, and set “Method” to “Use” and the “Threshold” to 50%. 3. Save as TIFF and exit. Such TIFF files are monochrome, and any color can be set in CAD.

1. Why, when using Ctrl+C in AutoCAD to copy objects, the copied objects are always located far away from the mouse cursor? How should this problem be solved? In CAD’s clipboard copy function, the default origin point is at the lower left corner of the graphic. It is best to use copy with a base point, so that the desired base point can be specified. Basepoint copying is a product of the requirements of CAD combined with the WINDOWS clipboard. This command is available in the “Edit” menu or in the right-click menu. 2. I have always used the Fangsong font for my written text, and when it is displayed, the size of the characters is roughly the same as that of letters and numbers. But some symbols are unavailable. And it takes up a lot of space. I’ve tried other fonts, but the difference in size between letters and numbers is too great. I would like to ask everyone what font to use. There’s also how to change the font style of certain characters in the text entered, so that they remain as a single unit when moved. Use multi-line text. 3. How can I measure the length of multi-segments and polylines with arcs? Just use the list command! 4. How to divide a geometric shape into equal parts? How to divide the interior of a rectangle into N×M smaller rectangles equally, or divide a circle into N equal parts, or divide any angle equally. The divide command only divides line segments equally; it cannot divide other geometric shapes in the same way. Direct equal division geometric shapes do not have such a function. But when you divide the two sides of a rectangle into M and N equal parts respectively, can’t you still obtain a division of the rectangle? 5. What command can be used to quickly cancel previous commands? I mean, undoing things – typing “u” over and over again is quite troublesome. Is there a way to go back to the state of things from the last saved command? Actually, it has already been available in CAD. It is the UNDO command; “U” cannot be used. Please check the prompt after the UNDO command: Command: undo Enter the number of operations to undo, or you can use the UNDO option in the command line to undo multiple operations at once. ““Start” and “End” define a set of operations as a group, while “Mark” and “Return” are used in conjunction with abandoning all operations to return to a predetermined point. If you use \"Back\" or \"Number\" to cancel multiple operations, AutoCAD will regenerate or redraw the drawing as necessary. This will happen at the end of UNDO; therefore, entering UNDO 5 will regenerate it once, while entering u u u u u will regenerate it five times. UNDO is ineffective for some commands and system variables, including those used to open, close, or save windows or drawings, display information, change the display of drawings, regenerate drawings, and output drawings in different formats. 6. What to do if it takes a long time to find the range when filling with hatch? When using hatch to fill areas, it’s common to struggle to locate the desired range, especially when the DWG file is quite large. The method I usually use is to apply the layiso command to isolate the layer on which the boundaries of the area to be filled are located; this allows me to quickly identify the area that needs to be filled using hatch. When filling with hatch patterns, the main lines need to be enclosed; it’s a good idea to use the LayISO command first to isolate the layer on which the lines that are to be filled lie. In fact, many people don’t pay much attention to the issue of defining the boundaries of the filling pattern – there is a setting for boundary sets available in the Advanced tab. The so-called boundary set refers to the set of objects within which boundaries are to be searched; the default setting is the “current viewport,” so when there are many objects on the graph, the process becomes slow. In this case, you can create a new boundary set, which will allow the system to find the boundaries much more quickly within that range. Of course, this boundary set should be relatively easy to obtain. 7. How to switch the stacking order of layers? AutoCAD does not have a layer stacking order; it only has objects that are in front and those that are behind. 1) Front and back are relative concepts; therefore, this approach is only necessary when you have a specific need (for example, to place the layer containing the Hatch objects at the back, and the layers containing axes, columns, and wall lines at the front in order to display the outer contours). 2) Generally, we only apply such operations to these objects on certain specific layers; thus, you can select objects by layer and then adjust their position to either the front or the back. 3) If you really want to arrange the objects according to your own custom layer order, there is a program that can do this: it’s available for download from the LayerManager pro download site (or on its website at www.layermanager.com) (e2002)

8.14 What is the tracking method for 2002? For example, the drawing tracking feature in R14 seems to have changed in version 2002; although it still serves as a tracking function, it’s not easy to use. I wonder if experts also encounter this issue when using it. Object tracking in versions after 2000 is much better than that in R14 – it’s much more convenient! It can also be used in conjunction with the polar axis, which is not possible with R14’s tracking. It seems your understanding is incorrect. In 2002, by typing “tk” when selecting points, it’s possible to keep tracking them, just like in R14. In fact, with 200x along with PolarSnap and AutoTracing, it’s almost unnecessary to type “tk” directly in order to perform tracking; moreover, it’s possible to track a large number of specific points (e2002). 9. In 2002, a table was created, containing various data, letters, and numbers. How can we make them align in the same way as in Word 2000? There is a simple way: use multi-line text (MTEXT) for each column of data, and the alignment can be adjusted through the properties of the MTEXT window. There are many techniques; you should experience them on your own. (lmlmss) 10. How to change the red text in the attached figure to gray (simple method)? Use the method of modifying block attributes (battman). This command is from 2002 and 2004; the R14 command is located under the \"Modify\" menu, under Object--Properties--Global. 11. Since there is an explode command, what command is used in the reverse direction? Instead of using the “Block” command, the “GROUP” command can achieve a similar result; the key is to learn it*. It depends on what object you are decomposing. If it is a polyline, it can be merged after being decomposed. “The “GROUP” command can be used to accomplish this. 12. Why is my CAD2000 stack button unavailable? To use stacking, first, there must be stack symbols (#, ^, /), and second, the content to be stacked must be selected before the operation can be performed. 13. How to draw 3D polyline? I don’t think CAD200X has such a feature? (Only available via toolbar) It is not available on its default toolbar. You can use it in the “Drawing” menu, or type 3dpoly using the keyboard. If used frequently, the toolbar can also be customized. I’m sorry, sz-gg, but I still want to thank you for your enthusiasm! I asked the wrong question. I want to try stretching a surface shape—such as an equilateral triangle—along a 3D polyline/or 3D spline curve. Since I couldn’t stretch it repeatedly along the 3D spline, I thought: if I could draw a smooth 3D polyline, maybe it would be possible to stretch it? So, what I want to draw are smooth 3D polyline shapes. This task cannot be completed. 3D polylines can only consist of straight line segments. Of course, if the length of the line segment is short enough, it becomes nearly smooth. So some small programs use this method to perform 3D stretching. However, as you said, stretching a triangular cross-section will cause distortion. 14. Does everyone know how to turn the line drawn with L into one drawn with PL? Use the pedit command to edit polylines, which includes a Join (J) option. 15. Dashed lines are drawn in model space, and they appear as dashed lines when printed, but why do they turn into solid lines when printed in layout? How do I print dashed lines in a layout? It is estimated that you once changed the linear scale, using the \"scale to paper space\" method (which is the default method in CAD). Try unchecking the box next to “Scale to paper space” in the linear settings dialog

16. The issue of linear proportions in the pattern space: lines that are set correctly in the model space fail to appear in the pattern space! There are two scenarios: if it is sufficient to have the line style appear correctly in paper space, without considering its appearance in model space, then I think you can simply change the line style scale back to its original value. If you want it to look good in both paper space and model space, you can simply uncheck the box next to \"Scale to paper space\" when setting the line type scale. psltscale——0 is fine. It is best to draw at a 1:1 scale in model space; otherwise, editing will be very troublesome! 17. Why do colored lines still appear as dashed lines after using a print style sheet? How should it be set up? There are two ways to set up printing; if it is color-related printing, the print style settings in the layer manager cannot be changed. Another is naming the print style. 18. Someone used the Chinese version of ACAD2000 to create over 140 drawings for me, as revisions to the as-built drawings. A considerable portion of the lines in this drawing are thickened using PLine polylines. When I tried to print it using ACAD2000 in Chinese version and ACAD2002 in Chinese version, the PLine polylines did not appear as thick lines; however, the thick lines defined using Line straight lines (as well as other curved lines) on the layers were displayed as thick. I tried various printing settings, but the problem persisted. What can be done to ensure that when the line width of thepline is set to a value other than 0, it is printed at that specified width? If the width of this polyline is too small, no width effect will be produced. (If drawing in millimeters and setting the polyline width to 10, when printing at a 1:100 scale, that corresponds to 0.1 millimeters.) ) Therefore, the width setting of polylines must take the printing scale into account. When the width is 0, it can be set according to the object’s properties (just like other objects). 19. I used AUTOCAD 2000 to create the drawings, with thick lines created using PLINE and a line width of 0.25. When printing at R14, the lines appeared thin; the thick lines were not printed as intended. I tried changing the line width to 0.3, but that didn’t work either. Finally, setting it to 0.35 resulted in proper printing. Why is this? Changing the line width for each drawing is quite tedious. Is there a setting in R14 that can resolve this issue once and for all? Printing should not be done using such methods; instead, the print pen width should be used for setting the line widths. Under R14, the line width is defined based on color; this line width is not affected by scale, and its value is expressed in millimeters. The line width is set in the print dialog box. PL lines are usually used during modeling; for creating planes, a colored single line is sufficient. When printing, if different scales are used, the width of the PL lines must be adjusted accordingly based on those scales. Your image probably has an issue where the line width does not match the output scale. It is still recommended to use a color pen with adjustable line width for printing. For inkjet printers, setting the pen width by color will result in printed colored lines. Change the pen number to 7, and it will print in black. 20. Previously, when I ran the solprof command, multiple contours could be displayed in the viewport. But these past two days, I’ve noticed that my CAD2004 fails to display the outlines when running the same commands. But it can be selected and printed. I’m not sure whether there are some parameters that have been accidentally modified by me, or if it’s due to some other reason Such an approach is equivalent to projecting the contour four times. The system uses freezing this layer in a new viewport (PV). This kind of work can be done in a different way. You can directly copy the model in the model space, adjust its orientation, then move it to the layout to set its outline. In this way, the four objects can be projected at once. 21. What are domains, blocks, and solids? Is it possible to combine several solids into one solid, so that this combined solid can be selected all at once? A domain is a two-dimensional area created using a closed shape or loop. A block is a collection of objects that can be combined to form a single object (or what’s known as a block definition); for example, one drawing can serve as a block within another drawing. There are two concepts related to solids: one refers to the tangible basic elements that make up a graphic, while the other refers to three-dimensional objects. For three-dimensional solids, “Boolean operations” can be used to combine them; for more general solids, “blocks” or “groups” can be used for combining them. 22. Please explain custom pattern fill files in AutoCAD 2000. There is no separate pattern file for the patterns used in filling; the files that define the shapes of these patterns are ACAD.PAT and ACADISO.PAT, which are located in the SUPPORT directory. Patterns are created by defining different line types and corresponding angles. It is possible to create pattern fill definitions by referring to ACAD.PAT and ACADISO.PAT and saving them as PAT files, but not any pattern can be used – for instance, arcs are not allowed. 23. A brief analysis of the DXF file format: DXF stands for Drawing Exchange File – it is an ASCII text file that contains all the information from the corresponding DWG file. Although it is not in ASCII format and thus has poor readability, it allows for fast creation of graphics. Even when using files from the same version, DWG files created on different types of computers (such as PCs and their compatible machines, as well as SUN workstations with different CPU architectures) cannot be exchanged. To overcome this limitation, AutoCAD introduced the DXF file format, which uses ASCII encoding; this enables different types of computers to exchange graphics by sharing DXF files. Due to its good readability, DXF files can be easily modified and programmed, allowing for editing and modification of external graphics.

24. How do I enter polar coordinates (angles) in 2.5D drawing? This phrasing isn’t very precise – are you referring to 3D drawing (since some books call drawing that includes elevation and thickness on top of the traditional 2D method \"2.5D\"), or are you talking about axonometric drawing (CAD has an isometric drawing function)? If it’s an axonometric drawing, then it’s not two and a half dimensions. When entering coordinates to draw an axonometric diagram, the angles for the three orthogonal directions are 30 (210) degrees, 150 (330) degrees, and 90 (270) degrees respectively. As @100

34. How can I remove the small dots in the image? I didn’t run any commands; I just clicked around in the image, and that’s when these dots appeared. They weren’t there before. I just installed some software, and after running a refresh command, those dots disappeared. What’s going on? The command is R. If you hate these dots, you can set the system variable blipmode=0, and then they won’t appear anymore. Before Acad2000, the default value for BLIPMODE was 1 (ON), which meant that such marks were left at the points where objects were selected – something really annoying. If this issue arises because of some software you have installed, you can find its template files and set BLIPMODE to off; otherwise, you’ll have to set it manually for each image... (yxc) 35. Previously, with a 3D mouse, pressing the scroll wheel served as the pan command, but now it has been changed to a capture function. How can this be changed back? Simply enter MBUTTONPAN in the command prompt, and the system will ask you to enter a new value. Set the system variable MBUTTONPAN=1. 36. How to measure the length of a certain arc in AUTOCAD 2000? And how to draw an arc with a length of 125 centimeters? Using the lengthen command, one can determine the arc length as well as change it. 37. How to create a custom graphic library in 2002 Design Center: In one file, turn everything you want to include in the library into blocks. Then, in the “AutoCAD Today” dialog box, go to “Symbol Library” and click “Edit” next to it. After entering, click “Add Link”, find the file you saved, and change the library name to whatever you desire. 38. How to draw the tangent and normal lines to a polyline at any point: Use construction tools; when specifying a point, first use the foot-of-the-perpendicular capture function, and then the system will ask you to specify a point on the polyline (referred to as a polyline in the current Chinese version). By selecting any point on the polyline, you can determine the normal line passing through that point. Once the normal line is established, drawing the tangent line should not be a problem. 39. What methods are there to transform a rectangular shape into a parallelogram? I mainly want to represent the sides of a polyhedron, but I don’t want to use 3D methods. I’m not sure whether you use the stretch command or grip editing; in either case, it’s possible to move multiple points together. Using the STRETCH command, you need to select the object to be stretched using an intersection window or intersection polygon; include the point that is to be moved within the selection window (such as one side of a rectangle), so that both points can move together. Using the grip editing method, by holding down the SHIFT key while selecting the blue grips, multiple points can be colored. After releasing the SHIFT key and clicking on one of the colored points, grip editing mode is activated, allowing all those points to be moved together. 40. What is an acad “dumb graph”? A drawing that contains only lines and dimension lines, with no pre-defined dimensions. This was a lazy practice in previous production; nowadays, using computer-aided design, such an approach should not be advocated. 41. Why is there always a fixed Z value displayed in the coordinate display area within the XY coordinate system? How to solve it? If there is still a z-value when querying, it means the object has been drawn at a specific elevation. The elevation command only changes the current elevation. The elevation command is “ELEV”, which sets the elevation to “0”. 42. Why can’t CAD files on the local network be opened? CADR14 can open CAD files located in Network Neighborhood, while CAD 2002 cannot open such files, but it is possible to preview them. The network is fine, and the local files can be opened. I’d like to ask how to deal with this issue? Right-click and select the “Launch AutoCAD” option from the menu. 43. In CAD2004, why are some strokes missing when text is exploded? This is probably a BUG from 2004. The only alternative is to use a different approach: output the typed text as a WMF file, delete that text and insert it into the WMF file, and then explode it. 44. Questions regarding the move command. The 2004 version that was originally installed worked fine, but today, when using the move command, I found that the object disappeared while it was being selected for movement; however, after the command was executed, the object had moved. It’s not possible to precisely control the exact position of the moving object. What could be the problem? ! Solution (Qiufeng): Code: Command: DragMode. Enter new value: Auto. In 45.CAD, there is an automatic saving setting; I wonder in which folder the automatically saved files are stored? Should the file extension be changed to DWG during restoration? 1) Start menu → Run... → Enter “%temp%” and press Enter to access the folder where the automatically saved files are located. 2) Yes. For the file c:\windows\temp\auto1.sv$, I usually set the auto-save interval to 20 minutes! During restoration, I simply copy the *.sv$ files to *.dwg files in DOS (or rename them to *.dwg)! For example: C:\windows\temp copy auto1.sv$ 1.dwg 46. How do I change a file extension under Windows? ! Under R14 it is auto*.sv$, and R2002 supports multiple documents; the file name is “graphics name” + random number + sv$ extension. You can use “*.sv$” for searching. In File Explorer and My Computer, files can display their file extensions; right-clicking on a file name allows for the option to \"rename\" it, thereby changing its extension (ll_j). 47. After printing to plt, how can it be printed in DOS? type name.plt > prn（yxc） – This can be used to create a plot.bat batch file; its contents are as follows (zhynt): copy 1% lpt1/b. In the file association settings, the plt file should be set to be opened using plot.bat. From now on, simply double-clicking a plt file will allow direct printing. 48. How can the “local” opening function be implemented? The R14 format cannot be opened in partial mode; version 2000+ allows this (yxc). No graphic file was selected in your image, so partial opening cannot be enabled. If you need to open it in partial mode, consider converting it to the R15 format. 49. How can one reverse the orientation of a drawing from model space in paper space? In paper space, the horizontal axis is the Y-axis and the vertical axis is the X-axis. I’ve seen drawings done this way, but I don’t understand how it’s done. The UCS command, where the three points represent the new origin, the point in the positive X-direction, and the point in the positive Y-direction, respectively. Place the point in the positive direction of the new X-axis directly above the new origin, and place the point in the positive direction of the Y-axis to the right. 50.Is OLE an abbreviation for a certain word? If so, what word is it? OLE (Object Linking and Embedding, the acronym for the full English name) integrates distributed objects and data into a single application in a certain way, allowing them to be processed by both the application in which they are currently located and the application that originally created them. Related to ActiveX, COM. OLE is a technology that was implemented quite early in Windows, and its interface is also simple. Based on OLE, OLE2 has now been developed; specifically, it will be a very thick book.

Number, very good! :kiss:

It’s very useful; I’ve already copied it

Hehe, these are all quite basic and simple, but they’re still useful for beginners