I would like a way I can see easily what cities are producing a resource that I can build an improvement on.
For instance, irrigation and granaries, I need to know which town is producing food, how much and if those improvements are already built there or no.
This would apply to markets, etc. where the bonus is a % of the existing resource of the city. Ultimately, I would like a screen where I can choose something I want to pay attention to and it lists this kind of information. If I need gold, well, these cities don't have a merchant or have a gold mine, but no market, etc.