         'Drag horizontally from the start of the second sound to the end of the second sound.'
       ]
       attach: to: '.spectrogram img'
+      nextOn: mouseup: '.spectrogram'
 
     new Step
       content: [

        'Drag vertically from the top of the mark to the bottom to select the frequency range.'
      ]
      attach: y: 'top', to: '.spectrogram img', at: y: 'top'

    new Step
      content: [

        'Drag horizontally from the start of the first sound to the end of the first sound.'
      ]
      attach: x: 'left', to: '.spectrogram img', at: x: 'left'
      nextOn: mouseup: '.spectrogram'

    new Step
      content: [
