           # Display the label map (overlay) controls.
           labelmapCtls = gui.addFolder('Overlay')
           labelmapTypeCtl = labelmapCtls.add(_loader, 'Type', labelmapTypes).name('Type')
-          labelmapOpacityCtl = labelmapCtls.add(volume.labelmap, 'opacity', 0, 1)
+          labelmapOpacityCtl = labelmapCtls.add(volume.labelmap, 'opacity', 0, 1).name('Opacity')
           labelmapCtls.open()
 
           # Change the label map type callback.

              volume.labelmap.visible = true
            else
              volume.labelmap.visible = false
            return

        # Adjust the camera position.
        renderer.camera.position = [0, 0, 240]

    # @param timePoint the series time point
    # @returns a new image object
    create = (parent, filename, timePoint) ->
      
      overlays =
        [
          {
            label: 'None'
            labelmap:
              temp_accessor: 'data/QIN_Test/blank.nii.gz'
              #accessor: (parent) -> ...
            colortable:
              temp_accessor: 'data/QIN_Test/generic-colors.txt'
              #accessor: (parent) -> ...
          }
          {
            label: 'deltaKtrans'
            labelmap:
              temp_accessor: 'data/QIN_Test/k_trans_map.nii.gz'
              #accessor: (parent) -> ...
            colortable:
              temp_accessor: 'data/QIN_Test/generic-colors.txt'
              #accessor: (parent) -> ...
          }
          {
            label: 'FXR Ktrans'
            labelmap:
              temp_accessor: 'data/QIN_Test/k_trans_map.nii.gz'
              #accessor: (parent) -> ...
            colortable:
              temp_accessor: 'data/QIN_Test/generic-colors.txt'
              #accessor: (parent) -> ...
          }
          {
            label: 'FXL Ktrans'
            labelmap:
              temp_accessor: 'data/QIN_Test/k_trans_map.nii.gz'
              #accessor: (parent) -> ...
            colortable:
              temp_accessor: 'data/QIN_Test/generic-colors.txt'
              #accessor: (parent) -> ...
          }
          {
            label: 'v_e'
            labelmap:
              temp_accessor: 'data/QIN_Test/v_e_map.nii.gz'
              #accessor: (parent) -> ...
            colortable:
              temp_accessor: 'data/QIN_Test/generic-colors.txt'
              #accessor: (parent) -> ...
          }
          {
            label: 'tau_i'
            labelmap:
              temp_accessor: 'data/QIN_Test/tau_i_map.nii.gz'
              #accessor: (parent) -> ...
            colortable:
              temp_accessor: 'data/QIN_Test/generic-colors.txt'
              #accessor: (parent) -> ...
          }
        ]

      labelmapFilename = overlays[0].labelmap.temp_accessor
      colortableFilename = overlays[0].colortable.temp_accessor

      parent: parent
      filename: filename
