Page 117 - Make Your Own PCBs with EAGLE from Schematic Designs to Finished Boards
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FIGURE 5-1 Board layout from the flasher project.
Open the flasher example project, and then open the board layout.
Layers
A fundamental part of the Board Editor is the concept of layers. EAGLE defines a huge set of layers
and also allows you to define your own layers and even automatically generate them from scripts.
You will only ever need to use quite a small subset of these layers. At any time, you can control
which layers are visible and which are hidden. This is useful to avoid clutter and to be able to
concentrate on a particular aspect of the design without the confusion of everything being visible all
the time.
The Layers command (second from the top icon on the left of the Command bar) provides you
with a list of all the layers available, with the ones currently visible highlighted (Figure 5-2).
