我正在嘗試通過(guò) iText7 在打印選項(xiàng)中檢查“按 pdf 頁(yè)面大小選擇紙張來(lái)源”，以滿足我生成 pdf 的項(xiàng)目要求。但是我正在使用的庫(kù)，我無(wú)法找到所需的東西。public static void createPdf_PageType(String baseUri, String[] src, String dest, PageSize pageSize, boolean rotate) throws IOException {    ConverterProperties properties = new ConverterProperties();    properties.setBaseUri(baseUri);    PdfWriter writer = new PdfWriter(dest);    PdfDocument pdf = new PdfDocument(writer);    PdfViewerPreferences preferences = new PdfViewerPreferences();    preferences.setPrintScaling(PdfViewerPreferencesConstants.NONE);    pdf.getCatalog().setViewerPreferences(preferences);    PdfMerger merger = new PdfMerger(pdf);    log.info("Generating PDF");    for (String html : src) {        ByteArrayOutputStream baos = new ByteArrayOutputStream();        PdfDocument temp = new PdfDocument(new PdfWriter(baos));        if(rotate) {        temp.setDefaultPageSize(pageSize.rotate()); /** Page Size and Orientation */        } else {            temp.setDefaultPageSize(pageSize); /** Page Size and Orientation */        }        HtmlConverter.convertToPdf(html, temp, properties);        temp = new PdfDocument(new PdfReader(new ByteArrayInputStream(baos.toByteArray())));        merger.merge(temp, 1, temp.getNumberOfPages());        temp.close();    }  //  pdf.getCatalog().setViewerPreferences(new PdfViewerPreferences().setPrintScaling(PdfViewerPreferences.PdfViewerPreferencesConstants.NONE));    pdf.close();    log.info("PDF Generated");}我只想勾選打印選項(xiàng)的復(fù)選框