Is there an option to show city spaces better?

[Waldin]

I have trouble placing my cities in a way that minimizes overlap, while maximizing the use of the terrain spaces. I found out how to turn the grid on, and can count grid spaces, but that method is slow and cumbersome. What I would need is a button to make every city (and preferably setter to) display the radius of grid spaces it can work on.

Is there such an option and I just missed it? Or is there a possibility to "mod" the game like that?

[Dr,ape]

You can turn on the map's grid, but that's about it.