class in UnityEditor.Experimental.GraphView
Manipulator that allows zooming in GraphView.
| DefaultMaxScale | Default max zoom level. | 
| DefaultMinScale | Default min zoom level. | 
| DefaultReferenceScale | Default reference zoom level. | 
| DefaultScaleStep | Default zoom step. | 
| maxScale | Max zoom level. | 
| minScale | Min zoom level. | 
| referenceScale | Reference zoom level. | 
| scaleStep | Zoom step: percentage of variation between a zoom level and the next. For example, with a value of 0.15, which represents 15%, a zoom level of 200% will become 230% when zooming in. | 
| ContentZoomer | ContentZoomer constructor. | 
| RegisterCallbacksOnTarget | Called to register click event callbacks on the target element. | 
| UnregisterCallbacksFromTarget | Called to unregister event callbacks from the target element. |