ViewRadius

ViewRadius(view=None, radius=None)

Returns or sets the radius of a parallel-projected view. Useful when you need an absolute zoom factor for a parallel-projected view :param view: [opt] title or id of the view. If omitted, current active view is used :param radius: [opt] the view radius

returns:if radius is not specified, the current view radius for the specified view if radius is specified, the previous view radius for the specified view