This mod allows you to route belts and pipes automatically: 1. Put the starting belt and ending belt on ground first, 2. then select the starting belt with control+right-click and 3. select a ending belt with control+left-click. Boom, belt ghosts are created! (hint: you can also disable underground belt by shift+ctrl+left-click at the ending belt)
Providing the player with new tools or adjusting the game interface, without fundamentally changing gameplay.