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reads  the  named files (or standard input if none are given) and
translates occurrences of underscores to the sequence which indi-
cates  underlining  for  the terminal in use, as specified by the
environment variable The file is read to determine the  appropri-
ate  sequences  for underlining.  If the terminal is incapable of
underlining, but is capable of a standout mode then that is  used
instead.   If the terminal can overstrike, or handles underlining
automatically, degenerates to If the terminal  cannot  underline,
underlining  is  ignored.   The  following options are available:
Underlining is indicated by a separate line containing  appropri-
ate  dashes  `-';  this  is  useful  when you want to look at the
underlining which is present  in  an  output  stream  on  a  crt-
terminal.   Overrides the terminal type specified in the environ-
ment with The following environment variable is used:  The  vari-
able  is  used  to relate a tty device with its device capability
description (see is set at login time, either by the default ter-
minal type specified in or as set during the login process by the
user in their file (see usually outputs a  series  of  backspaces
and  underlines intermixed with the text to indicate underlining.
No attempt is made to optimize the backward motion.  The  command
appeared in




































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