ZoomManager
ScalableRootEditPart. getZoomManager ()
ScalableFreeformRootEditPart. getZoomManager ()
ZoomComboContributionItem. getZoomManager ()
void
ZoomComboContributionItem. setZoomManager ( ZoomManager zm)
ZoomOutAction ( ZoomManager zoomManager)
ZoomInAction ( ZoomManager zoomManager)