Ok stupid question!
It's been several years since using Eagle.
I have my board made up but forget how to make it so that I am not having to
etch away large amounts of copper.
I recall something about drawing a rectangle on the board...... but cant
remember the rest of the steps. I know that once it is done it makes the
gaps between this rectangle and the wires, pads and devices. I guess its
like a mask?
Any help would be great.