Terrain Painting
0-9
Select depth level
LMB drag
Paint terrain with selected depth
ALT + Mouse wheel
Change selected depth
ALT + RMB
Pipette tool (pick depth)
SHIFT + Mouse wheel
Change brush size (1-8)
Pumps & Water
SHIFT + LMB
Add outlet pump
SHIFT + RMB
Add inlet pump
SHIFT + CTRL + LMB
Link pump to pipe system
CTRL + LMB
Flood fill
CTRL + RMB
Flood empty