I think is a bug or a patch to fix a bug, if you click to edit the area title, the region protection in the insert/context menus becomes active.
Moreover I get an exception trying to move a collapsed area region
************** Testo dell'eccezione **************
System.ArgumentOutOfRangeException: Index non compreso nell'intervallo. Richiesto valore non negativo e minore della dimensione dell'insieme.
Nome parametro: index
in System.ThrowHelper.ThrowArgumentOutOfRangeException()
in System.Collections.Generic.List`1.get_Item(Int32 index)
in SMath.Control.WorksheetControl.OnMouseUp(MouseEventArgs e)
in SMath.Control.Worksheet.OnMouseUp(MouseEventArgs e)
in System.Windows.Forms.Control.WmMouseUp(Message& m, MouseButtons button, Int32 clicks)
in System.Windows.Forms.Control.WndProc(Message& m)
in System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
in System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)