this is a screenshot of the graphical tool to view parameter-tracks: (source here )

# viewTracks - tcl/tk script to view formantsynthesizer parameter tracks
# format of formantsynthesizer parameter file is
# simmons & iles version of the klatt-synthesizer
# to see the labels there should be a line above each phone-section
# like "# name of phone: <name of phone, eg. a>"