Create ROI
      Create ROI creates a region of interest map from the vertices
      within or outside a border. Currently, one can only create an ROI
      map containing a single region of interest. 
      
      In Border Mode,
      select ROI from the pulldown
      displayed at the left bottom of the Toolbar. Create
      ROI is only active on surface structures in Montage,
      All,
      or Surface
      views. (wb_command also has operations for creating ROIs both on
      the surface and in volumes).
      
       
  
    
    
      - Any Borders used to Create an ROI must be
          displayed. If they are off, toggle Display Borders on in the Features
                Toolbox Borders tab, specific borders
          can be toggled on/off in Borders:
            Selection.
      - When a displayed border is clicked, the Create
            Region of Interest box will pop up for creating and
          saving an ROI consisting of all the vertices within the
          selected border. An ROI can be saved as a Dense Label or
          Label, with a label name and color, or as a Dense Scalar or
          Metric, with a numeric map value.  
      - Create ROI assumes that a border you
          choose to create an ROI from is a closed border. Border points
          are moved to the vertices nearest to them and these vertices
          are NOT considered to be part of the ROI to be created inside
          the border. Note: If an open border is selected, the program
          will automatically "close" the border by drawing a line from
          the first point in the border to the last point in the border.
        
      - Fields of the Create Region of
            Interest box are automatically filled to create label or
          scalar/metric ROIs with loaded file and map names. Use the New
          buttons to create new Maps/Files. If you do
            not change the File and Map names, the Map listed will be
            overwritten, redrawn with the one new ROI for the
          selected structure. 
      - Invert Selected Nodes option
          selects all vertices WITHOUT (not inside) the selected border
          to be part of the ROI. In this case, vertices nearest the
          border points are included in the inverted nodes.
      - When you are done creating ROIs, remember
          to save your changes using Save/Manage
                Files. 
    
    