如何把表单内容打印/导出到一页A4纸中？

var sheet = spread.getActiveSheet();
var printInfo = sheet.printInfo(); //打印设置纸张设置为A4
printInfo.paperSize(
  new GC.Spread.Sheets.Print.PaperSize(GC.Spread.Sheets.Print.PaperKind.a4)
); // 纸张设置为其他尺寸 // printInfo.paperSize(new GC.Spread.Sheets.Print.PaperSize(950,1350)); // 设置页边距
printInfo.margin({
  top: 10,
  bottom: 0,
  left: 0,
  right: 0,
  header: 0,
  footer: 0,
}); //是否打印控件的外边框
printInfo.showBorder(false); //是否打印网格线（默认打印）
printInfo.showGridLine(false); //  printInfo.headerCenter("&\ "Comic Sans MS"System Information "); //  printInfo.footerCenter("&P/&N/&F ");
printInfo.zoomFactor(0.99); //缩放
printInfo.qualityFactor(5); //打印的质量因子
printInfo.orientation(GC.Spread.Sheets.Print.PrintPageOrientation.landscape); //打印的页面方向。portrait纵 landscape
printInfo.centering(GC.Spread.Sheets.Print.PrintCentering.horizontal); //打印页面的居中方式。
printInfo.showColumnHeader(GC.Spread.Sheets.Print.PrintVisibilityType.hide); //获取或设置是否打印列标题。
printInfo.showRowHeader(GC.Spread.Sheets.Print.PrintVisibilityType.hide); //设置是否以黑白打印
printInfo.blackAndWhite(false); // 给每个表单循环设置printInfo
for (var i = 0; i < spread.getSheetCount(); i++) {
  spread.sheets[i].printInfo(printInfo);
}