code: def annotate(abf):
      
      msg="SWHLab %s "%str(swhlab.VERSION)
      msg+="ID:%s "%abf.ID
      msg+="CH:%d "%abf.channel
      msg+="PROTOCOL:%s "%abf.protoComment
      msg+="COMMAND: %d%s "%(abf.holding,abf.units)
      msg+="GENERATED:%s "%'{0:%Y-%m-%d %H:%M:%S}'.format(datetime.datetime.now())
      pylab.annotate(msg,(.001,.001),xycoords='figure fraction',ha='left',
                     va='bottom',color='#999999',family='monospace',size=8,
                     weight='bold')
      if abf.nADC>1:
          msg="Ch %d/%d"%(abf.channel+1,abf.nADC)
          pylab.annotate(msg,(.01,.99),xycoords='figure fraction',ha='left',
                         va='top',color='#FF0000',family='monospace',size=12,
                         weight='bold')
docs: stamp the bottom with file info.