Just wanted to mention that this would be a very good thing as those signs are only easy usable on keyboards with an english layout. (I dont even know if ctrl + alt gr + 8 would be recognized as ctrl + [ on german keyboards.)
I've uploaded 2.0.10 to allow these keys to be configured (though note these are not required when you let EDJP automatically set the next destination upon reaching existing waypoint). Also added a config variable to (hopefully) launch the overlay on a different monitor rather than default.