EAGLE CAD - Tools Used In The Board Editor

Beside the tools that we have in the Schematic Editor, Board Editor comes with a couple of his own:

Route - used to create a signal trace between two or more terminals/pins.

Ripup - deletes the traces between terminals/pins.

Polygon - used to create signal planes.

Via - useful for jumping with a trace from a layer to another.

Hole - used for making holes in the board.