TheoTown

Now I have red dots all over my screen when connecting the bus stops to the bus terminal. What are they and what is the yellow arrow next to the demolish icon in the top right corner of the screen? What does upgrade for bus teminal for and what does it do?

The red dots are the color of that bus route. The yellow arrow probably takes you back to the bus depot when you have placed the last bus stop on the route instead of leaving you over the bus stop. Upgrade for a bus route increases its capacity, speed, and size of the bus.