<BLANKLINE>
>>> curve = h.playlists.current().current()
>>> retract = curve.data[-1]
->>> retract.info['flat filter peaks (m)'] # doctest: +ELLIPSIS
+>>> retract.info['flat filter peaks'] # doctest: +ELLIPSIS
[<Peak flat filter peak 0 of surface deflection 610 [ -1.156...e-09 -8.840...e-10 -3.173...e-10 -7.480...e-10]>]
>>> retract.info['columns']
['z piezo (m)', 'deflection (m)', 'surface distance (m)', 'surface deflection (m)', 'flat filter peaks (m)']