The Delete existing traps check box is available on the Trap Page dialog boxes, and its counterpart, Delete traps in selection, is available on the Trap Selection dialog boxes.
Note: When you change an ink type and try to re-trap without selecting Delete existing traps or Delete traps in selection, a message appears, warning you that you have changed an ink type and that existing traps may no longer be valid. You can delete all existing traps, or continue without deleting existing traps.
See Also
Editing properties and generating traps