Note that this reference documentation is identical to the help that is displayed in MATLAB when you type “help ft_select_box”.

  FT_SELECT_BOX helper function for selecting a rectangular region
  in the current figure using the mouse.
 
  Use as
    [x, y] = ft_select_box(...)
 
  It returns a 2-element vector x and a 2-element vector y
  with the corners of the selected region.
 
  Optional input arguments should come in key-value pairs and can include
    'multiple' = true/false, make multiple selections by dragging, clicking
                 in one will finalize the selection (default = false)
 
  See also FT_SELECT_CHANNEL, FT_SELECT_POINT, FT_SELECT_POINT3D, FT_SELECT_RANGE, FT_SELECT_VOXEL