2. Enter "pu" in the command bar and click the space. The dialog box shown in the figure below pops up, and click Clear All.

3. Click "All Yes",

4. Then click the "Close" button to finish the content cleaning. It's done.

Extended data:

fundamental function

CAD is a visual drawing software at first, and many commands and operations can be realized through menu options and tool buttons. Moreover, it has rich drawing and drawing auxiliary functions, such as entity drawing, key point editing, object capture, marking, bird's eye display control and so on.

Its toolbar, menu design, dialog box, graphic opening preview, information exchange, text editing, image processing and graphic output preview bring great convenience to users. Secondly, it is not only more mature in two-dimensional drawing processing, but also more perfect in three-dimensional function, and can be easily modeled and rendered.

Basic functions of two-dimensional CAD.

Plane drawing: Basic graphic objects such as lines, circles, ellipses, circular polygons (regular polygons) and spline curves can be created in many ways.

Drawing assistance: provides drawing assistance, such as orthogonality, object capture, polar axis tracking, capture tracking, etc. Orthogonal function is convenient for users to draw horizontal and vertical straight lines, object capture can help pick up special points on geometric objects, and tracking function can draw diagonal lines and locate points in different directions more conveniently.

Editing graphics: CAD has powerful editing function, which can move, copy, rotate, arrange, stretch, extend, trim and scale objects.

Size: You can create many types of sizes, and the appearance of the size can be set by yourself.

Writing text: You can easily write text in any position and direction of the graph, and you can set the font, tilt angle and width scaling of the text.

Layer management function: graphic objects are all located on a certain layer, and you can set the color, line type, line width and other characteristics of the objects.

3D drawing: 3D solid and surface models can be created, and the solid itself can be edited.

Network function: you can publish graphics on the network or access AutoCAD resources through the network.

Data exchange: provide a variety of graphics and image data exchange formats and corresponding commands.

Two-dimensional to three-dimensional

Solprof command: Create the outline image of 3D solid in paper space.

Solview command: Use orthogonal projection method to create layout viewports to generate polyhedral views and sectional views of 3D solids and solid objects.

Soldraw command: Generate outline and section views in viewports created with solview command.

Usage and difference between soldraw command and solprof command;

The soldraw command needs to be combined with the solview command, and contour graphics and section views can only be generated in viewports created with the solview command.

Solprof command can be used alone, that is, it can be used in any view in paper space, and it can create an outline image of a three-dimensional entity.

Baidu encyclopedia -CAD