EXTDSPOPT(a b c)

EXTDSPOPT specifies the options to use for extended ACCEPT and extended DISPLAY statements for workstation I/O, and takes the form:
EXTDSPOPT(a b c)
Where a is DFRWRT or NODFRWRT, b is UNDSPCHR or NOUNDSPCHR, and c is ACCUPDALL or ACCUPDNE.