Structure Placement
SHIFT and SPACE work as normal for appending and inserting structure placement commands.
Modifiers
Hold SHIFT while dragging the mouse to place a line of structures.
Hold SHIFT+CTRL to drag a line of structures in the 4 cardinal directions. If holding the mouse over a building, it will surround that building with the selected structure.
Hold SHIFT+ALT to drag a box of structures.
Hold SHIFT+CTRL+ALT to drag a hollow box of structures.
When placing groups of structures, Z and X will increase and decrease the spacing between individual structures.
When placing factories (or other structures), their orientation can be rotated by cliking and dragging, or with [ and ].
Holding Q while placing structures will only place the framework, which will let the structure be completed later.
Holding ALT while placing a metal extractor will place 4 solars around it. This protects the mex and provides Overdrive.
Holding ALT (and using the scrollwheel to adjust building height) will place the structure on a small terraformed area. Pressing B will toggle terraformed placement. The height can also be adjusted with C and V. Additionally, hold the left mouse button down for a second hen placing the structure. This will bring up a building placement tooltip and allow height adjustment by moving the mouse.