On the Details tab of the Continuous footing: definition dialog, you can select footing end types.
Note: Options on this tab are available only when an inclined plane has been chosen as a reference level on the Vertical Definition tab.
Select footing end types for a continuous footing that lies on an inclined plane:
- Perpendicular to the edge:
or 
- Vertical:
or 
- Horizontally:
or 
.