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There are many functions in Haochen CAD drawing software, but sometimes because of insufficient understanding of some functions, some problems often occur when drawing. One of the problems is that the blocks are not displayed in the CAD drawing when drawing. What is the reason? Let’s introduce it in detail next! 1. The attributes of all attribute blocks are not displayed. If the attributes of all attribute blocks in the CAD drawing are not displayed, and the attributes of some blocks were visible before, they are now invisible, and the attributes of the newly created attribute blocks are not displayed. This situation may be due to the influence of the ATTMODE (ATT is the abbreviation of attribute ATTRIBUTE) variable. The ATTMODE variable can be set to 0, 1, or 2. The effects of setting different values are as follows. 2. Some attributes of the block are not visible. You can see the attributes by entering the block editor. If you cannot see the attributes on the drawing, you can see the attributes in the enhanced attribute editor that pops up by double-clicking the block, as shown in the figure below. In this case, you can first set ATTMODE to 2 to see if the attribute can be displayed. If the attribute is displayed, it means that the attribute itself is set to invisible, as shown in the figure below. Of course, we can also right-click the block and select Block Editor. After entering the block editor, we can see if we can see this attribute, as shown in the figure below. Setting attributes to invisible can make blocks with different attribute values look exactly the same. Blocks with invisible attributes can be used for statistics or other processing. Of course, if we want the attribute to become visible, we can select the attribute in the block editor and set Invisible to No in the properties panel. The above is how to set the properties of blocks in CAD drawings when drawing using Haochen CAD drawing software.