I finally know why others use CAD faster than me. They have already mastered these practical CAD skills. I haven’t finished watching them, and I’ve turned silently. It’s always useful.
How to set the text mirror to rotate and not rotate
A. Enter the MIRRTEXT instruction before mirroring.
B, input a new value of 0 means no rotation; input a new value of 1 means rotation
After the C, MIRRTEXT instruction is completed, enter the MI image command to be OK.
CAD version conversion
A, CAD high version can open all the lower version of the drawing
B, CAD low version can not open high version of the drawings
C, the high version into a lower version of the method, directly click Save As, the file type can be changed to any lower version
D. Converting a low version to a high version is more complicated and requires third-party software, that is, a version converter. 
CAD default save file is low version
A, enter OP in the drawing interface
B. Click to open and save the tab
C, in the file save - save as a low version can be selected
Polyline merging method
A, input PE instruction
B. Select a line to be merged, enter Y, and then enter J.
C, select all the lines that need to be merged, you can
Solution when padding is invalid
Sometimes it will not be filled when filling, in addition to system variables need to be considered, you also need to check the OP option. Solution: OP----display---application entity fill (check)
Solution when the selection is invalid
The correct setting should be that multiple objects can be selected continuously, but sometimes, continuous selection of objects will fail, and only the last selected object can be selected. Solution:
OP (option)---select---SHIFT button to add to the selection set (remove the hook)
Use the SHIFT key to add to the selection set "Remove the hook" and then add the selection to the valid and vice versa.
CAD command three-key restore
What if the system variables in the CAD are unintentionally changed, or if some parameters are intentionally adjusted? There is no need to reload at this time, and there is no need to change one by one. Solution:
OP option-----Configuration-----Reset
But after recovery, some options still need some adjustments, such as the size of the cross cursor~
What should I do if the middle mouse button is not working?
Under normal circumstances, the CAD wheel can be used to zoom in and out, and it is to pan (press and hold), but sometimes, when the wheel is held down, it is not a pan, but a next menu, which is very annoying. Solution:
At this time, just adjust the system variable mbuttonpan, the initial value: 1
Panning is supported when the button or pulley is held down and dragged.
The model in the command line, the layout is not the solution
Op----options------display----display layout and model tabs (checkmark)
Right click "OK"
As we all know, there are two keys, one is "carriage return" and the other is "space" but now let us use the right button to replace them. Solution:
OP option ----- user system configuration ------- use the shortcut menu (tick) in the drawing area to customize the right button
Click inside ------ put all the repeated previous commands on the tick
What if the round chart is not round?
Method 1, this is simple, you can directly input the command RE.
Method 2, op----display----just increase the smoothness of the circle or arc.
Scroll bar in the graphics window
Solution: op----display ------ display scroll bar in the graphics window can be op---display---display scroll bar in the graphics window.
What if I want the next line type to be printed the same as this one?
In other words. [How to save the print list], the solution: op option ----- print---add print list
But before that, you have to build your own own case.
How to reduce file size
After the graphics are finished, execute the Cleanup (PURGE) command to clean up the extra data, such as useless blocks, unstructured layers, unused linetypes, fonts, and size styles, which can effectively reduce the file size. General thorough cleaning requires PURGE two or three times.
-purge, with a minus sign in front, the cleaning will be more thorough.
Why the input text height cannot be changed
When the height value of the font used is not 0, the height is not prompted when writing text with the DTEXT command, so the height of the written text is constant, including the dimensioning using the font.
The mirrored font remains unrotated
When the value is 0, it can be rotated when the mirrored font is not rotated.
How to square out
First mark the picture, then use the ED command to select the special characters such as squared by selecting under the @Drop-down menu in the text format menu.
Special symbol input
We know that the "Ф" indicating the diameter is controlled by the control code %%C, the control code %%P indicating the ground plane, and the control code %%D by the degree symbol "°". But enter it in CAD.
1) T text command, drag out a text box
2) Right-click in the dialog box --- symbol --- some options will appear
The printed font is hollow.
Enter the TEXTFILL command on the command line. If the value is 0, the font is hollow. A value of 1 makes the font solid.
How to hide coordinates
Sometimes you will have some screenshot software to capture the CAD graphical interface or perform some similar operations, but in the process, are you worried about the coordinates of the lower left corner?
Because of its existence, it affects your operation.
Solution: UCSICON is set to OFF to turn off, otherwise ON to open.
An effective way to remove stubborn layers
An effective way to remove stubborn layers is to use layer mapping, and command laytrans to map the layer to be deleted to layer 0. This method can delete a layer with a solid object or defined by other block nesting, which can be said to be a universal layer remover.
How to close the *BAK file in CAD
1) Tools - Options, select the "Open and Save" tab, and then remove the checkmark before "Create Backup Every Save" in the dialog box.
2) You can also use the ISAVEBAK command to change the ISAVEBAK system variable to 0. When the system variable is 1, the “*BAK†backup file will be created each time you save.
The frame showing the coordinates at the lower left of the drawing area in the CAD sometimes turns gray. When the mouse moves in the drawing area, the displayed coordinates are not changed.
In this case, press F6 or change the COORDS system variable to 1 or 2.
When the system variable is 0, it means that the coordinate display is updated when the point is specified by the pointing device. When the system variable is 1, it means that the coordinate display is continuously updated. When the system variable is 2, it means that the coordinate display is continuously updated. When the distance and angle are required, the distance and angle to the previous point are displayed.
The content of layer 1 is hidden by the content of layer 2
If in a picture, the content of layer 1 is obscured by the content of layer 2, the hidden content can be displayed by using the tool - display - preposition.
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