Removing title and layer list when embedding scene to Ops Dashboard

[MinShin]

Hi,

I would like to create something similar to this flood impact solution. 

Operations Dashboard for ArcGIS  

Here 3D scene includes only slides at the bottom and buttons on the left.

However, when I add scene to Operations Dashboard, I get title bar and layer list widgets end so on on the right.

How can it hide title bar, layer list and buttons on the right when embedding scene to dashboard?

Thanks,

Min