The waterfall is plotted using horizontal slices as shown in the figure below. The figure is transferred from WinMLS using File->Copy Plot with Edit->White background checked.
The mode waterfall has a limit of 2000 points in each
slice. To get within this limit we recommend using smoothing with the setting
unchecked.
In the figure below, we see another example of waterfall in this mode.
In the figure below, the layout is changed. The ortogonal
function is turned on. If you prefer this layout, go to
Plot->Layout->Edit... and check the 
check box shown below.
