the u.s. supreme court's appellate jurisdiction derives from
Appellate jurisdiction is the power of a higher court to review decisions and change outcomes of decisions of lower courts. Most appellate jurisdiction is legislatively created, and may consist of appeals by leave of the appellate court or by right. Depending on the type of case and the decision below, appellate review primarily consists of: an entirely new hearing (a non trial de novo); a hearing where the appellate court gives deference to factual findings of the lower court; or review of particular legal rulings made by the lower court (an appeal on the record).