Switch Alt and Ctrl in hotkeys.
Show level of buildings on map.
Show overlay tiles(beams, tunnels).
Highlight efficiency of buildings on map.
Prevent scrolling of main window.
So, you're just started, and wondering how to play this game? Here's some tips for you:
To get first founds just click on forests and mountains. With those basic resources you'll be able to build your very first stone pit. Now you need something to store these stones, a storage. Get some logs, and place it next to the pit. Factories delivers their production to adjacent tiles, but you can extend the reach by building a transport network.
Take a note: roads just extends reach of factories, but not required to operate. You can build a complicated complexes without roads. Road price rises over distance, so it's will be very helpful for you in future. Here's an standalone complex with a full cycle of steel production.
Later in game you will need to build much more complicated lines, with a lot of required resources, and different routes of deliver, not just a roads! And don't worry about space! As soon as you'll get some solid income, you'll be able to expand your land, as far as you need!