tab13.PageNumber = "17";
tab13.DocumentID = docId;
tab13.Type = DocuSignAPI.TabTypeCode.Custom;
tab13.CustomTabType = DocuSignAPI.CustomTabType.Text;
tab13.Name = "txtTitle";
tab13.Value = mgrTitle;
tab13.CustomTabTypeSpecified = true;
tab13.AnchorTabItem = new DocuSignAPI.AnchorTab();
tab13.AnchorTabItem.AnchorTabString = "Title:";
tab13.AnchorTabItem.Unit = DocuSignAPI.UnitTypeCode.Pixels;
tab13.AnchorTabItem.UnitSpecified = false;
tab13.AnchorTabItem.IgnoreIfNotPresent = true;
tab13.AnchorTabItem.UnitSpecified = true;
tab13.AnchorTabItem.YOffset = -20;
tab13.AnchorTabItem.XOffset = 50;