The Axis list in the scan dialog box (Insert | Scan) enables you to select the axis (X, Y, or Z) where you want multiple sections. The None option is also available. It allows you to select a "section line" on screen.
Scans do not usually allow you to work with curve data. However, if you select None, a section scan lets you select a graphically-displayed section line that is then used to define the cut plane and scanning path.