[Paraview] 2d data visualization

[John Doe]

Hello,

While I am waiting for my paraview book, I was wondering if anyone knew how:

1. To display arrows (length scaled w.r.t. magnitude) instead of
colored edges for vector data?

2.  When warping scalar in the Z direction, how to warp to the log of
the data as opposed to just the linear magnitude?

Thanks,

Juan