Editable directions in map maker. - Evan Parker

Great, now I can change the directions from Las Vegas to the Grand Canyon, which led us the long way through Zion Nat'l Park and back down to Arizona to the north rim last year. It was a a last minute decision to go there and got the directions my phone's Google Maps. Hey, I just tried making the changes but there isn't street info for the US. Is there somewhere else that's done? - Rachel