在ZEBRA Printing上，始终保持1厘米左右的边距

Question

我将pdf打印到我的ZEBRA打印机。 ZEBRA纸张尺寸为10cm x 7Cm。我一直都是1厘米的间隙。

我怎样摆脱这个差距？

protected void Page_Load(object sender, EventArgs e)
{
    // step 1
    // need to write to memory first due to IE wanting
    // to know the length of the pdf beforehand
    MemoryStream m = new MemoryStream();

    Rectangle pageSize = new Rectangle(100f, 70f) ;

    pageSize.BorderColor = BaseColor.BLACK;
    pageSize.BorderWidth = 4f;
    pageSize.BorderWidthBottom = 2f;

    Document document = new Document(pageSize, 0f, 0f, 0f, 0f);
    try
    {
        // step 2: we set the ContentType and create an instance of the Writer
        Response.ContentType = "application/pdf";
        PdfWriter writer = PdfWriter.GetInstance(document, m);
        writer.CloseStream = false;

        // step 3
        document.Open();

        // step 4
       document.Add(new Paragraph("This is a custom size"));
    }
    catch (DocumentException ex)
    {
        Console.Error.WriteLine(ex.StackTrace);
        Console.Error.WriteLine(ex.Message);
    }
    // step 5: Close document
    document.Close();

    // step 6: Write pdf bytes to outputstream
    Response.OutputStream.Write(m.GetBuffer(), 0, m.GetBuffer().Length);
    Response.OutputStream.Flush();
    Response.OutputStream.Close();
    m.Close();
}

override protected void OnInit(EventArgs e)
{    
    InitializeComponent();
    base.OnInit(e);
}

private void InitializeComponent()
{
    this.Load += new System.EventHandler(this.Page_Load);
}

提前谢谢你， 机型暂

PS：我已设置margin = 0 Document document = new Document(pageSize, 0f, 0f, 0f, 0f);