fyiReporting.RdlDesign.RdlEditPreview.Undo C# (CSharp) Method

        public void Undo()
        {
            switch (_CurrentTab)
            {
                case DesignTabs.Design:
                    dcDesign.Undo();
                    break;
                case DesignTabs.Edit:
                    scintilla1.Undo();
                    break;
                default:
                    break;
            }
        }