Use the Slab Area tool () to define the slab area by clicking on each consecutive point (vertex). To close the polygon, click on the first polygon point or type "c" and press <Return>.
To draw a slab area
Choose the Slab Area tool ().
Click at each slab area vertex consecutively.
Snap to the first vertex and click to close the polygon (or type "c" and press <Return>).
Note: You can approximate curves by a series of straight edges.
) to define the slab area by clicking on each consecutive point (vertex). To close the polygon, click on the first polygon point or type