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Haochen CAD software provides a dynamic input function. Dynamic input allows us to focus on the drawing. We do not have to look at the CAD command line frequently during the drawing process, thereby improving drawing efficiency. But when are relative coordinates and when are absolute coordinates, they also have an impact on drawing drawing. Next, I will give you a detailed introduction to the difference between dynamically inputting coordinates in CAD software and inputting coordinates on the CAD command line! Dynamic input is an input method that follows the cursor in the graphics window. You can enter commands and prompts, and enter coordinates. Haochen CAD will prompt relevant commands when entering commands, as shown in the figure below. Dynamic input allows us to focus on the drawing. We don't have to look at the command line often when drawing, which can improve drawing efficiency. However, dynamic input is different from inputting coordinates on the command line. If no point has been positioned before, the input coordinates are absolute coordinates. When locating the next point, relative coordinates are entered by default, and there is no need to add the @ symbol before the coordinate value. The reason for this treatment is that relative coordinates are used more frequently in actual drawings. If you want to enter absolute coordinates in the dynamic input input box, you need to enter a # sign first. For example, entering #20,30 is equivalent to directly entering 20,30 and #20 on the command line.