SECTION./CURS
GET/CURSOR [output] [option] [marker] [curs_specs] [zw_option] 
	read cursor coords from display
SECTION./FEXT
GET/FEXTENS FITS_file extname
	get extension of FITS file with corresponding keyword EXTNAME 
SECTION./FHEA
GET/FHEADER FITS_file viewer
	extract (and view) the primary header of a FITS file
SECTION./GCUR
GET/GCURSOR [output_spec] [app_flag] [max]
	read and store cursor coordinates from the graphics display
SECTION./IMAG
GET/IMAGE frame [input_source] [ITT_flag]
	copy pixels from displayed image channel
SECTION./ITT
GET/ITT out_specs 
	read currently active ITT from image display
SECTION./LUT
GET/LUT out_specs [get_specs] [ITT] [format] [range]
	read currently active LUT\ from image display
