SECTION./AXES
OVERPLOT/AXES [x_axis_spec] [y_axis_spec] [x_sc,y_sci[,x_off,y_off]] 
              [x_lab] [y_lab]
	overplot a coordinate box with tickmarks and labels
OVERPLOT/AXES [coord_str] [x_lab] [y_lab]
	overplot a coordinate box around a displayed frame 
SECTION./COL
OVERPLOT/COLUMN frame [x-coord] [y_start,y_end] [offset] [l_type]
	overplot a column of a frame on a graphic device
SECTION./COLU
OVERPLOT/COLUMN frame [x-coord] [y_start,y_end] [offset] [l_type]
	overplot a column of a frame on a graphic device
SECTION./CONT
OVERPLOT/CONTOUR frame [coord_str] [contours] [sm_par]
	overplot contour map of 2-dim. frame with smoothing option
SECTION./DESC
OVERPLOT/DESCRIPTOR frame [descr] [start,end] [offset]
	overplot the contents of a descriptor
SECTION./ERRO
OVERPLOT/ERROR table [col1] [col2] col3 [direct] [bar]
	overplot table error column
SECTION./GRAY
OVERPLOT/GRAY frame [coord_str] [gray_lev] [sm_par] [gray_ness] [options]
	overplot gray scale map of 2-dim. frame with smoothing option
SECTION./GRID
OVERPLOT/GRID grid
	overplot a grid on an existing coordinate box
SECTION./HIST
OVERPLOT/HISTOGRAM tab col [offset] [bin[,min[,max]]] [exc] [log] [opt]
	overplot histogram of a column in the table
OVERPLOT/HISTOGRAM frame [offset] [log] [opt]
	overplot the histogram of an image
SECTION./KEYW
OVERPLOT/KEYWORD [key_name] [start,end] [offset]
	overplot the contents of a keyword
SECTION./LINE
OVERPLOT/LINE [l_type] [x_sta,y_sta[,wo|,mm|,sc|,no]] 
                       [x_end,y_end[,wo|,mm|,sc|,no]]
	overplot a line on a graphic device
SECTION./ROW
OVERPLOT/ROW frame [y-coord] [x_start,x_end] [offset] [l_type]
             [multi_color_option] [2ndcol_spec]
	overplot a row (line) of a frame on a graphic device
SECTION./SYMB
OVERPLOT/SYMBOL [s_type] [x_coord,y_coord[,wo|,mm|,sc|,no]] [s_size]
	overplot a symbol
SECTION./TABL
OVERPLOT/TABLE table [plane1] [plane2] [x_sc,y_sc[,x_off,y_off]] 
        [symbols] [lines] [flag_dir]
	plot table data on selected plotting device
SECTION./VECT
OVERPLOT/VECTOR fram_a fram_b [coord_str] [scale_r] [pos_range] [sm_par] [head]
	overplot vector map from two 2-dim. images with smoothing option
