Hi,

You can use the Diagram ZoomFactor property on the client-side to incrementally zoom in or out (100 is the default zoom value, less than that will zoom out the diagram, a higher value will zoom in). You can also use the Diagram zoomToFit to fit the document contents in the viewport or zoomToRect to fit the specified document rectangle respectively.

There's also the ZoomControl widget provided in the package. With it you can let your users zoom in and out the view interactively. How to use this control is show in the Controls sample, included the MvcDiagram package.

Regards,
Lyubo

Thanks,
I used  diagram.getNodeEffects().push(new GlassEffect());
var zoomer = MindFusion.Controls.ZoomControl.create($("#zoomer")[0]);
    zoomer.setTarget(diagram);

and I am getting zoomin/zoomout feature.