Scaling____
Undo/Redo
   
Selection____
Shape tools____
Fold
Dig & grow____
Smoothing____
Shading____
Use 1 finger to draw selection and create volume, 2 fingers to zoom & move
 
      Rotate: Left button drag
      Zoom: Right button drag or mouse wheel or Left button drag + CTRL key
      Translate: Left button drag + SHIFT key
Use 1 finger to rotate, 2 fingers to zoom and translate