} // Control of allowed input

        //
        // ------------------------------------------------------------------------------------------------------------------
        //
        // Definition of ToolStripButtons
        private async void toolStripButton_Start_Click(object sender, EventArgs e)
        {
            // new instance: new frame: new instance of NewFrame
            NewFrame outputWin = new NewFrame(size);

            outputWin.Show();

            // Generation of Graphics instance correlated to image in picturebox
            Graphics g = Graphics.FromImage(outputWin.Field.Image);

            //g.Clear(Color.White);

            // Grap parameters from dataGridview2 (they could be modified by user)
            MM0.GetData(dataGridView2, Para);

            // Random Jump by IFS
            await Task.Run(() => MM0.OutPut(outputWin.Field, g, rand,
                                            textBox_XShift, textBox_YShift, textBox_Scaling, size, Para, textBox_IFSName, textBox_Points, radioButton_non));

            // methode running in async mode -> no freezing of desktop due to long-time calculation duration of this methode

            // Dispose graphic instance
            g.Dispose();
        } // calculation of fractal structure by given parameters
        }// Program-End with Exit-Button

        private void toolStripButton_Info_Click(object sender, EventArgs e)
        {
            NewFrame Info = new NewFrame();

            Info.Show();
        }