The general format is the following:
timestamp obspoint [args]
where timestamp is an integer value in nanoseconds, obspoint is a word and args a whitespace-separated list of arguments that depends on the specified observation point.
timestamp leonardo nbbytes 0 0 80 t0 t1 t2 t3 data
timestamp libpointing event_timestamp
timestamp system x,y event_timestamp
timestamp toolkit x,y
timestamp repaint
timestamp screen
timestamp leonardo nbbytes 0 0 68 t0 t1 t2 t3 data