X (and Y) scale is the ratio of the new dimension over the old dimension of a reference object. For example, if a horizontal straight line of 10m long becomes 20m, X scale should be 2. The view is then scaled back so that the view occupies the same area size as before. The view's clip area is updated as well.

public void ScaleAllGroup(
	double xs,
	double ys
)

Public Sub ScaleAllGroup ( 
	xs As Double,
	ys As Double
)

public:
void ScaleAllGroup(
	double xs, 
	double ys
)

member ScaleAllGroup : 
        xs : float * 
        ys : float -> unit