Viewing curves

Graphical viewing for performance and price book curves are provided in the SKB. The two options provided are:

Selecting the knowledge engineering view icon displays a graphically representation of the curve data for all or individual impeller diameters for a given curve number, while the price book view displays the graphical price book representation of curve data for a given curve number. Display options for the charts can be modified using chart settings under User Preferences.

How do I view performance curves for?