When a court of appeal has an appealable judgment or order before it, does the court have jurisdiction to affirm, reverse or modify it?

When a court of appeal has an appealable judgment or order before it, the court has jurisdiction to affirm, reverse, or modify it, and to direct the entry of a proper judgment or order. (Code Civ.Proc., 43, 906; Pen.Code, 1260.) Where the parties to an appeal stipulate that the judgment or order must be affirmed, reversed, or modified, this court may, if it agrees, render a decision pursuant to the stipulation. (See, e.g., People v. The Federal Land Bank of Berkeley (1948) 31 Cal.2d 871, 192 P.2d 948; Miller v. Board of Supervisors of Santa Clara County (1966) 64 Cal.2d 890, 50 Cal.Rptr. 915, 413 P.2d 859.)