Under the Pressure tab, a graph of the changes in Pressure across the layers is shown. There is one plot for each direction previously chosen in the Options dialog (see here). Here, only the Z-direction had been chosen.

Under the Velocity tab, a graph of the changes in Velocity across the layers is shown. Here, the velocity component in flow direction is shown. There is one plot for each direction previously chosen in the Options dialog (see here). Here, only the Z-direction had been chosen. The velocity component in the chosen direction is averaged over the pore voxels for each layer in this direction.

The Plots tab also includes a Convergence tab with a chart of the Permeability (or Mean Velocity or Flow Rate) at given Iteration values. See the convergence graphs of the iterative solver for each of the calculated directions previously chosen in the Options dialog (see here).