Model components may be grouped with model tree ancestors of the same type in the Parasite Drag tool so that individual wetted area contributions are summed and form factors are applied to the group. Grouped components may be viewed by clicking the component name where (+) is displayed. For Wings that are generally reflected across XZ by default, the right and left sides are automatically grouped. To group a component with an ancestor, click the drop-down menu in the component row and select on of the available ancestors. The grouped component will contribute its wetted area to that of the ancestor and inherit the ancestor’s form factor, reference length, etc. An example of this would be to group a canopy with a fuselage such that the canopy is included in the fuselage parasitic drag component.