Zero foundation, how to learn CAD quickly?

First, how to create a new graphic template with CAD?

Draw a good picture-create a block-save it in your own block library and insert the block directly next time. Click Copy to copy? Variable dialog box, select internal? Dimensions determines that l, w and d (length, width and height) will appear in variables. I like to use H to represent my height, which can be modified by deleting and adding.

Second, how does CAD establish redundant lines?

Method 1: TR space bar, select the place to be repaired, press the space bar again, and use the mouse to remove redundant lines. Method 2: Select all the pictures first, then TR the space bar, and remove the redundant lines, and it will be OK.

Third, how does CAD extend the line?

After selecting the line, you can click the grip and pull at will. Ryan. Count one? Does the predecessor count as one? Is it an extension to hold down shift when cutting tr? S can also be stretched? It depends on what you do. If you are not familiar with the operation of CAD, you can operate according to the prompt of the cursor or the prompt bar at the bottom of the screen. In addition, with CAD, you can use shortcut keys as much as possible without looking around the screen, which is efficient.

Fourth, how to scale CAD?

The scroll key in the middle of the mouse will become larger when pushed up and smaller when pushed down. This is to adjust the proportional relationship with the screen without affecting the actual drawing size. If you need to scale the drawn image, use the "sc" command ... enter the scaling ratio, and then select the scaling origin.

5. How does 5.CAD modify the text?

If it is written by DT or T command, double-click Modify to move, copy and paste.

6. How does 6.CAD define attributes?

Select the "Drawing-Block-Create" menu to open the "Block Definition" dialog box. ?

Enter a name for the block in the Name edit box. ? —— Click "Pick Point" in the "Base Point" setting area, and then pick the intersection of the center lines of the drawing area as the insertion base point, or directly enter the coordinates of this point in the dialog box. ? -Click object selection in the object setting area, then select the whole drawing in the drawing area, and press Enter to return to the block definition dialog box. ? The object setting area also has three radio buttons, which have the following functions:? Preserve: You can preserve the original image after defining the block. ? Convert to Block: After defining a block, convert the original object into a block. ? Delete: Delete the original object after defining the block. -You can set the units of the block in the "Quick Units" drop-down menu in the setting area. Generally speaking, it is better for a block not to specify a unit (that is, select "No Unit" in the "Quick Unit" drop-down menu), which is more convenient. -Enter some text descriptions about the block in the edit box of the description menu. -Click OK to finish defining the block.

Seven, CAD capture grid

Press F3? There's another row below? The first one is capture? Snapping is snapping the grid? Turn this off? F3？ Is it an object capture switch? Is it to capture the vertex of the line you draw or something? See if you want to use that yourself.

Eight, CAD object tracking

Object tracking, also known as object tracking, is generally used in screen vectorization, GIS and CAD. ? As the name implies, object tracking is actually tracking objects. Tracking what object? The object here refers to the entity objects (points, lines and surfaces) on the raster map when vectorization, and object tracking is the process of drawing vector objects along the geometric characteristics of the entity objects in the vector graphics layer on the raster map. You can open it by pressing the shortcut key.

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