It's my first post here so i have to congratulate devs for this great game. This post is just a suggestion of a signal placing helper so i though to make this post ( i dont know if there is a mod like this but i didnt find it till now)
I found this image on search
Can we make a mod that will separate the available blocks with different colors and we should see them on demand by pressing a custom kay like debug button. For some of us, the signaling system is a bit complicated so will be a good helper for the newcomers or if we are getting confussed due to high traffic
(not my map)