In the UI below, the very first symbol at the left, the one that looks like a blue radar? Toggle that to enter and exit the heat maps. You can also use the hotkey H.
You can also press F1 to open the tutorials! There’s tons of them.
Thanks so much - it was 'H' I was after.
I appreciate the direction to F1 and the tutorials. However, they don't tell me what the controls do. They don't tell me how to group/ungroup objects, edit them, exit editing easily, why my 'Z' buttons spins an object irratically when I hold it down in order to use my mouse, rather than smoothly allowing me to move the object with my mouse. How to attach/place buildings on top of walkways, why the grid around objects don't seem to align to the pathway grid...there are lots of things it really doesn't explain. I don't know what the process is called half the time so don't know what I'm looking for.
I would just like a beginners tutorial of what everything does with regards to building.