     # @noTransitsButton.show()
     @classifySummary.fadeOut(150)
     @nextSubjectButton.hide()
-    @canvasGraph.marks.destroyAll() #clear old marks
+    # @canvasGraph.marks.destroyAll() #clear old marks
     # @canvas.outerHTML = ""
     @resetTalkComment @talkComment
     @resetTalkComment @altTalkComment

        
    # SEND CLASSIFICATION
    @course.incrementCount()
    console.log 'YOU\'VE MARKED ', @course.count, ' LIGHT CURVES!'

    @classification.annotate
      classification_type: 'light_curve'
      selected_id:          @subject.selected_light_curve._id
      location:             @subject.selected_light_curve.location
    for mark in [@canvasGraph.marks.all...]
      @classification.annotate
        timestamp: mark.timestamp

    # dump all recorded click events to classification
    @classification.set 'recordedClickEvents', [@recordedClickEvents...]
    
    # # DEBUG CODE
    # console.log JSON.stringify( @classification )
    # console.log '********************************************'
    
    # send classification (except for tutorial subject)
    unless @classification.subject.id is 'TUTORIAL_SUBJECT'
      @classification.send()

    @canvasGraph.marks.destroyAll() #clear old marks
    @recordedClickEvents = []
    @Subject.next()

