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How to use Altium20 to draw a high-fidelity PCB ruler

PCB ruler is a practical tool that many engineers need to use in their work. Usually when people want to DIY a ruler, they may not know some things to pay attention to, which leads to various problems when DIYing it. In this live broadcast, a professional teacher demonstrates the entire DIY process of a PCB ruler! At the same time, we will also use the power of the masses (to exchange ideas together in the live broadcast room) to jointly define this ruler.