using GrapeCity.ActiveReports.Document.Section.Annotations; 
 
private void AddAnnotations() 
{ 
    rptAnno rpt = new rptAnno(); 
    rpt.Run(); 
    this.viewer1.Document = rpt.Document; 
 
    AnnotationLine line = new AnnotationLine(); 
    line.ArrowCapWidth = 4.5f; 
    line.ArrowCapHeight = 4.5f; 
    line.DashStyle = System.Drawing.Drawing2D.DashStyle.DashDotDot; 
    line.DashCap = System.Drawing.Drawing2D.DashCap.Round; 
    line.ShowArrowCaps = AnnotationLine.ShowArrowCap.RightOnly; 
    line.FillArrowCaps = true; 
    line.LineColor = Color.Red; 
    line.LineWidth = 1; 
    line.LineLocation = AnnotationLine.LinePlacement.Bottom; 
    line.Text = "レビューしてください。";
    line.Font = new Font("Arial", 12f, FontStyle.Bold);
    line.TextColor = Color.Blue; 
    line.TextAlignment = System.Drawing.StringAlignment.Center; 
             
    line.Attach(4, 4); 
    this.viewer1.Document.Pages[0].Annotations.Add(line); 
 
    line.Height = 0.50f; 
    line.Width = 1.5f; 
}