Finding air wires in Eagle

I can think of three options:

• Zoom out as much as you can then use the route tool on the tiny board, this catches the air wire, then zoom in again and route it.

• You can also disable the top and bottom layers so the air wire becomes more visible.

• Yet another option is to run the provided "length.ulp" script (File->Run... or ULP button). This script shows a list of all the nets, on that list there is a column "Unrouted", some net is not completely routed a value should appear here instead of "--". You can then type on the command line "show net_name" to highlight it.

There is an ULP called zoom-unrouted. When you run it, it will automatically zoom your view to the first airwire it finds. Very useful. Here is the link:

https://cadsoft.io/resources/ulps/349/

Air wires are located on layer #19: "Unrouted". By disabling most/all of the other layers, they can easily be spotted.