Overlay and Map Settings
    Overlay and Map Settings sets display options for layer
        data selected in the Overlay Toolbox
      Layers tab. 
    
    To open these settings, click the  button for a selected layer.
 button for a selected layer. 
    
    
      - The box contains
            tabs with options for different types of Layers data: Labels,
            Layer (volume layer settings), Metadata, Palette,
            Parcels, Trajectory. Tabs will be
          active (not grayed-out), depending on the data in the File
          selected for that layer.
      - The Do Not
              Replace option at the bottom of the box allows more
            than one Settings box to be open at a time. Otherwise, if
            settings for another layer is selected the contents of the
            box will switch to options for that most recently selected
            layer.
        - Color Bar contains controls for 
        the adjustment of color bar attributes.  Fine tuning of the color
        bar is performed using the annotation editing features. 
        - Labels contains an Edit
            button used for modifying the color and name of labels in
            a  *.label or *.dlabel file. Edits are applied within
            the session when the Apply or OK buttons are
            clicked. The edits are not written to the label file until
            saved in Save/Manage
                Files. 
        - Layer contains voxel drawing
            settings for files containing volume data. The 3D options to
            draw voxels as cubes or rounded cubes are only active in All view.
            These options should only be used for files with a
              limited number of voxels to draw (*.dscalar files that
            contain only subcortical voxels, low resolution volumes, or
            highly thresholded higher resolution volumes) because
            wb_view attempts to draw all voxels in the volume, causing
            the program to hang when large numbers of voxels are
            drawn. 
        - Metadata will allow
            creation/editing of map metadata for each layer file. This
            option is not active currently. 
        - Palette (see image) contains
            settings for adjusting the type and range of the data color
            palette, setting thresholds on displayed data, and shows a
            histogram/basic statistics on the data distribution.
        
        
          - Thresholds set by the sliders
              or entered values in the toggle box are shown by the
              shading in the histogram and can be applied inside or
              outside the set values. 
      
        
          - Palette spectrum is set for
              the Full range of the map data, a Percent
              range of the full data, or a Fixed range of the full data
              values. Positive, zero, or negative values may be toggled
              on/off for display with the checkboxes. 
      
        
          - Mouse
                    controls for zooming and panning are
              active in the histogram chart field. 
      
        
          - Data Options
                allow a palette setting to be applied to all maps in a
                data file and/or to multiple data files.
      
        - Parcels
              sets the mode and color for which an identified parcel is
              indicated on the surface. Color Mode: Outline
              indicates the selected parcel's boundary with a highlight
              color, Fill shows the entire selected parcel with
              the highlight color, and Off turns off the parcel
              indication altogether. 
        - Trajectory
              sets Attributes, Display Mode, and Data Mapping for
              display of tractography trajectory files. This tab is
              currently inactive pending the release of tractography
              data.
 
          