Oregon Revised Statutes Procedure in Civil Proceedings § 19.415

(1) Except as provided in this section, upon an appeal in an action or proceeding, without regard to whether the action or proceeding was triable to the court or a jury, the scope of review shall be as provided in section 3, Article VII (Amended) of the Oregon Constitution.

(2) No judgment shall be reversed or modified except for error substantially affecting the rights of a party.

(3) Upon an appeal in an equitable action or proceeding, review by the Court of Appeals shall be as follows:

(4) When the Court of Appeals has tried a cause anew upon the record or has made one or more factual findings anew upon the record, the Supreme Court may limit its review of the decision of the Court of Appeals to questions of law.