Continuing on from the subject initiated by Andrew Kohlsmith at
Some ideas that expand on what is normally attained 'out of the box'.
1) One of the better visibility things you can do is change the default
palette highlighted colour of the air-wire layer to magenta rather than
the default colour of eagle, which I find does not stand out very well.
set palette black;
set palette 14 0xB4FF00FF;
Now when you route through a maze of air-wires, your air-wire stands out
more than it does with the default arrangement.
To restore the default colours run the script
2) If you manage your net classes well you could turn off the air-wires
of particular net classes like all those containing the word 'Power'.
This you would do from a Text menu button that runs a ULP.
3) Use a text menu button to run a ULP to manage a selectable list of
the nets you wish visible or hidden.
4) The following gets very close to the use case desired. While routing,
using an assigned key, alternate the air-wire view between all and the
one you are routing or a pre selected group of air-wires.