Changing Stack cross-section types is fairly straightforward as usual. Just like with Fuselages, simply choose the Type dropdown under the XSec tab and select the desired option. Note that for some section families, such as airfoils, the Chord and T/C parameters or others may be used to set width and height. Also remember that the cross-section normal direction points toward the end of the Stack which means that the leading edge of airfoils or left-side of custom curves will be associated with the left side of the Stack. Additional information about each section type is found in the Cross-Section Details subject.