Line Middle click Rectangle Shift + Cursor drag Undo Ctrl + Cursor drag Zoom S/Switch between circle/square/triangle brush Space/Toggle ambient heat on/off Ctrl + I /(zontal brush size Shift + Ctrl + R ??Horizontal mirror for selected area Ctrl + R Rotate selected area counterclockwise Only the left Ctrl, Shift, and Alt buttons are enabled to work, not the ones on the right Command Line)/Invert Pressure and Velocity map W ???? Toggle gravity modes (+ Ctrl when STK2 is out) Y???? Toggle air modes Ctrl + B