New Constraint (External)

On the Mining | Pit Design tab, in the Build group: Click New Constraint | New Constraint (External) to digitise a new pit polygon as an external constraint that will direct the build area to be outside its boundary.

When you click the New Constraint button, the cursor will change to allow you to begin digitising a new polygon in the design. When you click a point, the constraint polygon will begin. You can click additional points in the constraint to create the polygon. To finish the string, either double-click as you digitise the last point or press Escape (Esc). The new string will be auto-closed when you have finished. The constraint polygon is shown in Red in the design:

In Shrinking mode (Pit/Down, Dump/Up), an External constraint will place the pit build area outside of any intersection between constraint polygon and pit string. In Expanding mode (Pit/Up, Dump/Down), constraints always expand the pit build area.