网页打印问题，打印设置，打印预览，打印分页，纵打，横打及页面边距
1、控制"纵打"、 横打”和“页面的边距。
（1）<script defer>
function SetPrintSettings() {
// -- advanced features
factory.printing.SetMarginMeasure(2) // measure margins in inches
factory.SetPageRange(false, 1, 3) // need pages from 1 to 3
factory.printing.printer = "HP DeskJet 870C"
factory.printing.copies = 2
factory.printing.collate = true
factory.printing.paperSize = "A4"
factory.printing.paperSource = "Manual feed"