I have a thin foundation, I have just started to learn CAD, and many instructions are not very clear

Look at CAD help, it's clearer than people say.

First print a CAD command table, then select the commonly used, and then select the two-letter combination or single-letter one in the commonly used, learn these first, and then learn the multi-letter, if you work, learn 3 commands a day, and learn very firmly in a few weeks,

Of course not, there are graphic buttons, provided that you know what those graphic buttons are for, using commands is just to improve the speed of mapping, because many parameters still need to be entered by the keyboard, and the graphical buttons are only some of the most commonly used or more commonly used, not as complete as commands. There are pros and cons to both, and besides, some orders are very unpopular and generally not needed.

If you want to develop on CAD, it is recommended that you still use commands better, which can not only improve the speed, but also show your skills, click the button that is only useful for beginners, professional masters generally do not use that, full command drawing, that is called handsome.

You can't memorize orders, you can use the method of computer operation to memorize it, it's fast and firm.

According to your own situation, you can remember a few commonly used ones, and you can just know some of the others, and many of them are not used, hehe.

1 Missing plugins, you're antivirus.

2 Reinstall the repair command.

Specify the first point, for example, the coordinates of the first point are: 100, 100, format: @100, 100

Sketch - bottom left, the first item is unchecked. Nothing to do with object snaps!!

2.Custom Size Fill: You must use a custom pattern to activate the spacing below the angle to set the spacing of the fill grid yourself, which is suitable for tile filling, but only if you have a custom pattern associated with it. If you don't, hi me.

Don't forget to give extra points.

The content is as follows: stretching, it is several aspects to pay attention to.

S is a shortcut to stretching, which is true, but still many people don't understand how to use it.

1. When you type s, it is equivalent to the computer asking you which "object" you want to stretch (object, that is, what you want to stretch).

2. If it is a rectangle, do you want to stretch one corner or two corners? It's about what you choose.

3. If you are just stretching a line, then you have to select the "end" of the line you are stretching (remember, you must box the "end of the line" you want to stretch, otherwise, the computer will not pay attention to you at all).

Let's try it out with this rule.

s is for stretching.

Press s to expand the part you want to stretch and move the mouse in the direction you want to stretch.

[If you just stretch a line, then you have to select the "end" of the line you are stretching (remember, you must box the "end of the line" you want to stretch, otherwise, the computer will not pay attention to you at all)], it is purely nonsense, if you select the whole object when stretching, the effect of the s command and the movement (command m) at this time is the same.

First identify the industry you want to engage in that can use CAD, and then practice the drawings or examples of the industry in a targeted manner, a lot of practice will help you understand the professional knowledge.

In a word, do more exercises.

**, it is generally a CAD tutorial, of course, some examples are still desirable. It depends on the profession or industry.

Get a job drawing, you'll learn it!

Click Settings on the left - Tree Filter - and put a checkmark on the feature......

Go to the bookstore and buy a textbook, do more exercises, and you will remember the basic commands.

The coordinate system CAD contains WCS (World Coordinate System) and UCS (User Coordinate System).

World coordinate system: x-y or x-y-z, whose origin is located in the lower-left corner of the graphics window, all displacements are calculated relative to this origin, and there is a "mouth" sign at the origin.

User coordinate system: x, y, z axes and origin directions can all be moved or rotated, even depending on a specific object, but the 3 axes are still perpendicular to each other. In this coordinate system, the directional position of each axis is very flexible, and there is no "mouth" sign at the origin.

In addition, there is also the theory of relative coordinates, the format is (@x, y, z), which indicates the coordinates of the next point relative to the previous point, for example, the previous point is a(20,30,40), and now the input point b (@10,20,30) means that the three coordinate values of point b are 10, 20, and 30 units larger than the coordinates of point a.

The second is the polar coordinates, and the input format is (r

Indicate that the length of the line you want to draw is 80, and the horizontal angle is 72, it's as simple as that.

The "@" designation is based on the point below the current cursor point.

80" is the length of the currently drawn line.

72" means that the angle formed by the currently drawn line and horizontal line is 72"@80<72" means that based on the point under the current cursor point, a straight line segment with a length of 80 and an angle of 72 degrees is drawn.

Relative coordinates, 80 is the length of the relative distance projected on the x-axis, and 72 is the number of angles between the drawn line and the x-axis.

I have AutoCAD textbooks from 2007, I can send them to you if I need them.

@是相对坐标, 80 is the length of the line, "72 is the angle of the line 72° (note counterclockwise rotation 72°), generally draw a rectangle with @ relative coordinates.