Synopsis Decrease (shrink) vertical size of figure relative to its parent.
Function
FProperty vshrink(num vs)
Description Vertically shrink the current figure relative to the figure it is contained in (its parent).
Shrink is expressed as a factor smaller than 1.
Also see shrink and hshrink.
Also see shrink and hshrink.
Examples 
b1 = box(vshrink(0.5), fillColor("blue"));
b2 = box(b1, fillColor("yellow"));
render(b2);