Hello. In The Settlers 3 I remember there was a way to toggle an overlay which showed possible building spaces all over the map. I know you get a basic one when selecting a certain building to build. But, there was a way to turn on an addtional overlay which showed possible building sites for ALL sizes of buildings.
Or was this function only available in Settlers 2? Thanks, Gavin

I played Settlers 3 around 9 years ago, but I don't remember such a thing. You might be confusing it with 2. Especially since in 3 there are no fixed sites, so displaying all possibilities would cause a lot of overlap.