Spire.Doc.Documents.Paragraph para = header.AddParagraph();
DocPicture pic = para.AppendPicture(pic_path);
pic.WidthScale = 50;
pic.HeightScale = 50;
pic.TextWrappingStyle = TextWrappingStyle.InFrontOfText;
我已经选择了InFrontOfText 但是还是会被 页眉有背景颜色的盖住,怎么可以让我加的图像水印置于最顶层?