How can I get the 2D relative displacement graph

Hello,

I am trying to calculate the eigen-frequencies of a 2D circular plane using the solid mechanics --> eigenfrequencies module. When I plot the displacement in 2D, the graph appears to only show absolute values of displacement. I am interested in seeing both positive and negative displacement values relative to 0. Is there anyway I can achieve this result in 2D? or do I must simulate this in 3D.

Any guidance will be greatly appreciated.

Thanks,
Dennis

Model is attached below.