The Interdimensional Traveler: A Full Body Character Design - ZBrush Creature Design: Creating Dynamic Concept Imagery for Film and Games - page 112

4. To stretch the length of the body, click and drag from the ZTool off to the background. If you hold Shift
while you do this, the transpose line will draw in a straight line. Release the mouse and the key when the
line is drawn.
5. Hold Shift again and click and drag in the center circle of the line. Because you are holding Shift,
the movement will constrain to the axis of the transpose line. Move the lower body down, stretching the
length of the torso. Compare Figure 3-10 to the previous image to see this effect.
6. We will now extend the arm length as well. Transpose mask the body so that the arms are unmasked.
Again you can manually adjust the masking using the mask pen and rectangle brushes. Draw a transpose
move line from the shoulder to the elbow. Once this line is in place, while holding Alt, click and drag in
the circle at the elbow ( Figure 3-11 ) . This will lengthen the arm.
Figure 3-10: Mask the upper body as in image A, then lengthen the torso with the Transpose Move brush
as in image B.