The current boards are rarely that kind of rectangular or other. They are all irregular, but there are several kinds of line drawing outer frames, which are unable to choose from. In addition, now because of the use of the equipment (such as SMT), now They all have to spell V-CUT, but the spacing spacing is different, some have spacing, and some have no distance. It is okay to do a batch for the first factory. It is not possible to fight according to the first factory, and the steel net cannot be set. Therefore, there is no special case, it is best not to have a spacing; in addition, some file design may draw a small cubic hole to draw a small cubic hole on the shape layer. Compared to PADS, it is better to put it on the appearance layer. It is easy to misunderstand the manufacturer as to rush out this hole or make the NPTH attribute. For some PTH attributes, it is easy to have problems.