说明：  对于不同要求的 PCB 电路设计， Protel DXP 提供了一些高级的编辑技巧用于满足设计的需要，主要包括放置文字、放置焊盘、放置过孔和放置填充等组件放置，以及包地、补泪滴、敷铜等 PCB 编辑技巧。 这些编辑技巧对于实际电中板设计性能的提高是很重要的，本章将对这些编辑技巧进行详细说明
(For the different requirements of the PCB design, Protel DXP provides some advanced editing techniques used to meet the design requirements, including placing text, place the pad, placed over the hole and place to place fill and other components, and packages to make up tears drops, copper and other PCB editing skills. The real power of editing techniques for the improvement of the performance board design is very important, this chapter will explain in detail these editing techniques)