text: from matplotlib.widgets import MultiCursor
  from pylab import figure, show, pi, arange, sin
  
  t = arange(0.0, 2.0, 0.01)
  s1 = sin(2*pi*t)
  s2 = sin(4*pi*t)
  fig = figure()
  ax1 = fig.add_subplot(211)
  ax1.plot(t, s1)
  
  
  ax2 = fig.add_subplot(212, sharex=ax1)
  ax2.plot(t, s2)
  
  multi = MultiCursor(fig.canvas, (ax1, ax2), color='r', lw=1)
  show()
  