logging uf su usage

[Chad A. Adlawan]

hello list,
  does the default syslog.conf log all usage of the "su" command ?  if so
may i knoe where ?
  ive been reading the syslod.conf man page but im not sure whether i
understood everything.  and if it doesnt, may i knoe how do i tell syslog to
log all usage of the "su" commang ?
TIA,
chad