How can i enable bar code preview in TC51 Zebra device.

I would like to enable this view in my Xamarin + EMDK library. I am using the below configuration in my application.

var config = _scanner.GetConfig();  config.SkipOnUnsupported = ScannerConfig.SkipOnUnSupported.None;  config.ScanParams.DecodeLEDFeedback = true;  config.ReaderParams.ReaderSpecific.ImagerSpecific.PicklistEx =   ScannerConfig.PicklistEx.Hardware;  config.DecoderParams.Code39.Enabled = true;  config.DecoderParams.Code128.Enabled = true;  _scanner.SetConfig(config);