

In case you have placed something and you want it to be apart of the group, then Shift click the two of them and click the icon that looks like a Tree and a plus sign. When creating a group of objects or building, pay attention to what is grouped and what is not.Pay attention to the lower right corner when in a building tab, there's usually useful configurations that you can take advantage of (i.e angle snap, path width, length, barrier length, curvature and window).If you're planning to build something large and complex, pause your game.You can see and change them in the Settings menu under Controls

Note: There are lots of other hotkeys and I recommend looking at all of them.
