public void setNominalSwing(int n) {
    for (int sector = 0; sector < slmCtrl.settings.retardSetA[0].length; sector++) {

      //      setElement(0, extinctA, extinctB);
      //      setElement(1, extinctA + LC_Swing, extinctB);
      //      setElement(2, extinctA, extinctB + LC_Swing);
      //      setElement(3, extinctA, extinctB - LC_Swing);
      //      setElement(4, extinctA - LC_Swing, extinctB);

      //  swing of 0.01 = 0.0628 shift in retardance
      // ??? Does swingEquivalent vary with Sector? Yes.
      double swingeAngle = slmModel.getSwing() * slmModel.getWavelength() * 2 * Math.PI;

      switch (n) {
        case 0: // Extinction, nominal 0.25, 0.50
          // ++ >>>>>>>> default extinction settings
          // slmCtrl.settings.retardSetA[0][sector] = 1559;
          // slmCtrl.settings.retardSetB[0][sector] = 1559;
          slmCtrl.setRetA(sector, slmCtrl.settings.retardSetA[0][sector]);
          slmCtrl.setRetB(sector, slmCtrl.settings.retardSetB[0][sector]);
          break;
        case 1:
          slmCtrl.settings.retardSetA[1][sector] =
              slmCtrl.settings.retardSetA[0][sector] + swingeAngle;
          slmCtrl.settings.retardSetB[1][sector] = slmCtrl.settings.retardSetB[0][sector];
          slmCtrl.setRetA(sector, slmCtrl.settings.retardSetA[1][sector]);
          slmCtrl.setRetB(sector, slmCtrl.settings.retardSetB[1][sector]);
          break;
        case 2:
          slmCtrl.settings.retardSetA[2][sector] = slmCtrl.settings.retardSetA[0][sector];
          slmCtrl.settings.retardSetB[2][sector] =
              slmCtrl.settings.retardSetB[0][sector] + swingeAngle;
          slmCtrl.setRetA(sector, slmCtrl.settings.retardSetA[2][sector]);
          slmCtrl.setRetB(sector, slmCtrl.settings.retardSetB[2][sector]);
          break;
        case 3:
          slmCtrl.settings.retardSetA[3][sector] = slmCtrl.settings.retardSetA[0][sector];
          slmCtrl.settings.retardSetB[3][sector] =
              slmCtrl.settings.retardSetB[0][sector] - swingeAngle;
          slmCtrl.setRetA(sector, slmCtrl.settings.retardSetA[3][sector]);
          slmCtrl.setRetB(sector, slmCtrl.settings.retardSetB[3][sector]);
          break;
        case 4:
          slmCtrl.settings.retardSetA[4][sector] =
              slmCtrl.settings.retardSetA[0][sector] - swingeAngle;
          slmCtrl.settings.retardSetB[4][sector] = slmCtrl.settings.retardSetB[0][sector];
          slmCtrl.setRetA(sector, slmCtrl.settings.retardSetA[4][sector]);
          slmCtrl.setRetB(sector, slmCtrl.settings.retardSetB[4][sector]);
          break;
      }
    }
  }