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

  FT_PLOT_SENS visualizes the EEG, MEG or NIRS sensor array.
 
  Use as
    ft_plot_sens(sens, ...)
  where the first argument is the sensor array as returned by FT_READ_SENS or
  by FT_PREPARE_VOL_SENS.
 
  Optional input arguments should come in key-value pairs and can include
    'label'           = show the label, can be 'off', 'label', 'number' (default = 'off')
    'chantype'        = string or cell-array with strings, for example 'meg' (default = 'all')
    'unit'            = string, convert the sensor array to the specified geometrical units (default = [])
    'fontcolor'       = string, color specification (default = 'k')
    'fontsize'        = number, sets the size of the text (default = 10)
    'fontunits'       =
    'fontname'        =
    'fontweight'      =
 
  The following options apply to MEG magnetometers and/or gradiometers
    'coil'            = true/false, plot each individual coil (default = false)
    'orientation'     = true/false, plot a line for the orientation of each coil (default = false)
    'coilshape'       = 'point', 'circle', 'square', or 'sphere' (default is automatic)
    'coilsize'        = diameter or edge length of the coils (default is automatic)
  The following options apply to EEG electrodes
    'elec'            = true/false, plot each individual electrode (default = false)
    'elecshape'       = 'point', 'circle', 'square', or 'sphere' (default is automatic)
    'elecsize'        = diameter of the electrodes (default is automatic)
  The following options apply to NIRS optodes
    'opto'            = true/false, plot each individual optode (default = false)
    'optoshape'       = 'point', 'circle', 'square', or 'sphere' (default is automatic)
    'optosize'        = diameter of the optodes (default is automatic)
 
  The following options apply when electrodes/coils/optodes are NOT plotted individually
    'style'           = plotting style for the points representing the channels, see plot3 (default = [])
    'marker'          = marker type representing the channels, see plot3 (default = '.')
  The following options apply when electrodes/coils/optodes are plotted individually
    'facecolor'       = [r g b] values or string, for example 'brain', 'cortex', 'skin', 'black', 'red', 'r', or an Nx3 or Nx1 array where N is the number of faces (default is automatic)
    'edgecolor'       = [r g b] values or string, for example 'brain', 'cortex', 'skin', 'black', 'red', 'r', color of channels or coils (default is automatic)
    'facealpha'       = transparency, between 0 and 1 (default = 1)
    'edgealpha'       = transparency, between 0 and 1 (default = 1)
 
  Example
    sens = ft_read_sens('Subject01.ds');
    figure; ft_plot_sens(sens, 'coilshape', 'point', 'style', 'r*')
    figure; ft_plot_sens(sens, 'coilshape', 'circle')
    figure; ft_plot_sens(sens, 'coilshape', 'circle', 'coil', true, 'chantype', 'meggrad')
    figure; ft_plot_sens(sens, 'coilshape', 'circle', 'coil', false, 'orientation', true)
 
  See also FT_READ_SENS, FT_DATATYPE_SENS, FT_PLOT_HEADSHAPE, FT_PREPARE_VOL_SENS