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After using Haochen CAD software to draw CAD drawings, if you want to output the drawings, you must perform CAD printing. However, sometimes there will be some printing problems. For example, when performing CAD blanking printing, redundant lines or grids will appear. Why is this? Is there any solution? Let’s find out today. Solution: 1. There are no extra lines in the layout, as shown in the figure below: 2. Viewport - Shading and Printing - Hide has been set during layout. ； However, extra lines still appear when previewing and printing.: Grid-like lines. As shown below: 3. At this time, enter DISPSILH-space-1-space in the command bar. ； DISPSILH is a variable that controls the display of only outlines when hiding a three-dimensional entity. This variable has two values 0 and 1. The system default is 0 (representing the display of the contour line after blanking). If it is set to 1, the contour line after blanking will not be displayed. After setting, refresh (regen) and you can see the effect. As shown below: 4. After printing, there will be no extra lines. As shown below: The above are the problems and solutions to the grid or extra lines that appear during CAD printing in Haochen CAD software. I believe everyone has a certain understanding after reading the above CAD tutorial, so you don’t have to worry about this kind of problem next time.