If the trial court is of the opinion that the verdict is so excessive or inadequate that a new trial should be granted for that reason only, it may indicate to the party or his attorney within what time he may enter a remittitur or additur. This remittitur or additur is to be entered only with the consent of the plaintiff or the defendant as the case may be, as an alternative to a new trial, and is to be entered only if the issue of quantum is clearly and fairly separable from other issues in the case. If a remittitur or additur is entered, then the court shall reform the jury verdict or judgment in accordance therewith.