If only a single number is given, this is used for both the width and the height.
If defined and the drawing is larger than the given size, the drawing is uniformly scaled down so that it fits within the given size.
size ends in an exclamation point
size is taken to be the
desired minimum size. In this case, if both dimensions of the drawing are
size, the drawing is scaled up uniformly until at least one
dimension equals its dimension in
There is some interaction between the