PCB circuit board design, the first thing to do is set up the first class items the board, in fact, set the working layer PCB board.
Protel 99 PCB document editor offers up to 32 working layer, usually can be completed automatically routing 16-layer PCB circuit board, even when the manual wiring layer can reach 20 or more, you can draw on any level. Protel 99 to 32 layer work on eight other FuZhuCeng, divided into several different types of special working level. Users need to work on the significance of the various layers have a clear understanding.
Select the Design menu, select Options command in the drop-down menu and its execution, the dialog box that can be opened at the working level, the level can be turned on or off as needed in the dialog box. If the name of the former level, "√", it means that the level is open, no "√" indicates that the level is off, turn off level not non-existent, but does not show it.
