I'm confused about the district zone overlap, raised in a different thread. which districts -- and specifically, which buildings -- can have an impact on more than one city---and what is the tile range # of that district/building? (I know the Colisseum can affect all cities within 6 tiles, but what are the other things? And is there a highlighting function that automatically shows whether a district will cover which tiles so you can visually see it? Or do you have to manually count?