eDrawings Viewer API - how to hide the triad?

I'm using the 2014 eDrawings viewer ActiveX control to view docs in a C# application, and I can't figure out how to hide the XYZ coordinate triad in the lower left.  I'm using this tool to generate screenshots of models, some as thumbnails, so the resulting images are relatively small compared to this large triad that blocks part of the model, so I'd really like to hide it when creating these thumbnail images.

It looks like this should be possible by using this command:

 

edrwModel.set_EnableFeature(EMVEnableFeatures.eMVTriad, false);

This syntax works for other options, like open readonly, DisableSNLCheckout, etc. but doesn't seem to work for hiding the triad.

Any ideas?

Thanks,

Randy

SolidworksEdrawings