The Tornado output options are:
Tornado chart — When checked, generates a tornado chart showing the sensitivity of the variables using range bars.
Spider chart — When checked, generates a spider chart showing the sensitivity of the variables using sloping curves.
Show ___ top variables — Indicates the maximum number of variables to include in the tornado charts if many variables exist. The charts can show about 20 variables clearly.
Chart Options — Displays the Chart Options dialog, which enables you to customize some aspects of how chart labels are displayed (Tornado Chart Options).