Wis. Stat. § 808.09: Reversal, affirmance or modification of judgment.

Upon an appeal from a judgment or order an appellate court may reverse, affirm or modify the judgment or order as to any or all of the parties; may order a new trial; and, if the appeal is from a part of a judgment or order, may reverse, affirm or modify as to the part appealed from. In all cases an appellate court shall remit its judgment or decision to the court below and thereupon the court below shall proceed in accordance with the judgment or decision.