ScreenToGif.Modern.btnPrevious_Click C# (CSharp) Method

        private void btnPrevious_Click(object sender, EventArgs e)
        {
            StopPreview(true);

            if (trackBar.Value == 0)
            {
                trackBar.Value = trackBar.Maximum;
            }
            else
            {
                trackBar.Value = trackBar.Value - 1;
            }

            this.Text = Resources.Title_EditorFrame + trackBar.Value + " - " + (_listFramesEdit.Count - 1);
            DelayUpdate();
        }