The cross section context menu enables you to manipulate the selected plane; for example, you can flip the view or change the plane axis. It also provides another means to access the Define Section dialog box and the Projection Area Measurement function (described in Cross-Sectioning a 3D Model).
The context menu can be accessed by right-clicking the plane itself.
Enable Dragging - When Enable Dragging is selected, two white circular handles appear at the center of each edge. Selecting one of these handles enables you to move the section plane along the normal axis or along the plane axes.