Subpanel names are listed on the left side of the panel. Only one subpanel may be selected at a time. For example, on the Distance panel there are four subpanels: two nodes, three nodes, two points, and three points.
To select a subpanel, click the radio button next to the subpanel name on the left side of the panel.
Each subpanel contains input controls that allow you to enter necessary information for the procedures you wish to perform.