Documentation – Page Layout and Margins

Java: Add Margins to PDF Pages

Tue, 09 Jun 2026 00:00:00 +0000

Add margins to PDF pages

The Java sample adds 36-point margins to pages 1 and 3 of the source document.

Steps

Create a PdfFileEditor instance.
Select the page numbers that should receive new margins.
Call addMargins with the input file, output file, page list, and margin values.
Save the updated PDF.

Java example

public static void addMarginsToPdfPages(Path inputFile, Path outputFile) {
    PdfFileEditor pdfEditor = new PdfFileEditor();
    pdfEditor.addMargins(inputFile.toString(), outputFile.toString(), new int[] {1, 3}, 36, 36, 36, 36);
}

Java: Add Page Breaks in PDF

Tue, 09 Jun 2026 00:00:00 +0000

Add page breaks in a PDF

Use this workflow when a page needs to be split into multiple pages at a known Y position.

Steps

Create a PdfFileEditor instance.
Build one or more PdfFileEditor.PageBreak entries with the page number and break position.
Pass the page break array to addPageBreak.
Save the updated PDF document.

Java example

public static void addPageBreaksInPdf(Path inputFile, Path outputFile) {
    PdfFileEditor pdfEditor = new PdfFileEditor();
    pdfEditor.addPageBreak(inputFile.toString(), outputFile.toString(), new PdfFileEditor.PageBreak[] {
            new PdfFileEditor.PageBreak(1, 400)
    });
}

Java: Resize PDF Page Contents

Tue, 09 Jun 2026 00:00:00 +0000

Resize PDF page contents

The Java sample resizes the content area on pages 1 and 3 and checks the boolean return value.

Steps

Create a PdfFileEditor instance.
Choose the pages whose content should be resized.
Call resizeContents with the target width and height.
Check the return value and handle failure before continuing.
Save the updated document.

Java example

public static void resizePdfPageContents(Path inputFile, Path outputFile) {
    PdfFileEditor pdfEditor = new PdfFileEditor();
    if (!pdfEditor.resizeContents(inputFile.toString(), outputFile.toString(), new int[] {1, 3}, 400, 750)) {
        throw new IllegalStateException("Failed to resize PDF page contents.");
    }
}