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When using the HaoChen CAD software to create drawings, issues can arise with CAD annotations at times. For example, when trying to use the quick dimensioning tool QDIM to add dimensions, after selecting the area in question, many annotations with a value of 0 appear in between the actual dimensions, as shown in the figure below. How should this problem be solved? Next, I’ll tell you how to solve this common issue with CAD annotations! I. Reasons for CAD quick dimensioning issues This issue may be caused by overlapping lines; let’s verify that now. Using this feature in HaoChen CAD software, I drew several rectangles with overlapping boundaries, but no 0 value appeared in the middle after adding annotations, as shown in the figure below. By eliminating the issue of overlapping lines as mentioned above, it seems that the lines in the middle do not overlap completely; there are two lines that are very close to each other, with a distance between them that is so small as to be considered zero. I tried moving a rectangle outward by 0.001 and then using quick annotations, and the problem reoccurred, as shown in the figure below. After enlarging the drawing, the cause of the problem was identified; indeed, there is an issue with very close spacing between the lines in this diagram. II. Solutions for quick CAD dimensioning: Such problems arise because the drawings are not drawn with precision, and these drawings are often not created by one’s own hand. It is not easy to modify the graphics either, as the lengths of the lines vary and all of them need to be retained; it’s not possible to simply use the ‘delete and redraw’ function to resolve this issue. Manually adjusting the positions of these lines is also quite troublesome. Then one has to find a way to remove those annotations whose label value is 0. There are two methods for this, and one can decide which method to use based on the complexity of the graphic and personal preference. 1. Manually delete annotations with a value of 0. Although multiple dimensions can be annotated at once using quick annotation, each annotation is an independent object; we can select the annotations with a value of 0 and delete them manually, as shown in the figure below. This method is simple to handle, but the problem is that if these annotations need to be adjusted in position or settings using the quick annotation QDIM later on, annotations with a value of 0 will reappear. 2. When performing quick annotation, it is rather cumbersome to edit and delete annotation points; when using quick annotation, one can use E to delete and add annotation points. After executing the QDIM command and selecting the graphics and dimensions, there is no need to determine the position of the dimensions right away; you can type E and press Enter, then delete the unnecessary dimension points from the diagram, as shown in the figure below. When using HaoChen CAD for quick dimensioning, if multiple graphics are selected, many dimension points may end up on the same line, making it difficult to delete them. If the pattern in the graphics follows a certain rule, such as long and short lines overlapping each other, we can try to select only the endpoints of the long lines, avoiding the intersection points of the short lines; this may help prevent such problems, as shown in the figure below. If selected in this way, even if there is a gap between the rectangular area in the middle and those on the sides, the issue of a value labeled as 0 will not occur. Therefore, when using the HaoChen CAD software for drawing, in order to avoid issues similar to those related to rapid CAD annotation, it is necessary to ensure accurate drawing by entering coordinates, distances, and using capture functions. If drawing is done accurately, such problems will not occur.