Basic `vdims` question

Hello,

I have a basic question about the use of vdims and Curve.

What does passing multiple vdims do? The resulting plot only displays the first vdim so what is the point? For example.

features_df  = pd.DataFrame({['v': [1,2,3], 'f_2_3': [2,3,4], 'f_1_2':[10, 11, 12], 't': [5,6,7]})

hv.Curve(features_df, kdims=['t'], vdims=['v', 'f_2_3', 'f_1_2'])

Thanks,

Douglas