143082Scael.\" Copyright (c) 1980, 1990 The Regents of the University of California. 236172Sbostic.\" All rights reserved. 319095Smckusick.\" 443082Scael.\" %sccs.include.redist.man% 519095Smckusick.\" 6*44912Scael.\" @(#)colcrt.1 6.5 (Berkeley) 07/05/90 736172Sbostic.\" 843082Scael.Dd 943082Scael.Dt COLCRT 1 1043082Scael.OS BSD 3 1143082Scael.Sh NAME 1243082Scael.Nm colcrt 1343082Scael.Nd filter nroff output for CRT previewing 1443082Scael.Sh SYNOPSIS 1543082Scael.Nm colcrt 1643082Scael.Op Fl 1743082Scael.Op Fl 2 1843082Scael.Ar 1943082Scael.Sh DESCRIPTION 2043082Scael.Nm Colcrt 2119095Smckusickprovides virtual half-line and reverse line feed sequences 2219095Smckusickfor terminals without such capability, and on which overstriking 2319095Smckusickis destructive. 2419095SmckusickHalf-line characters and underlining (changed to dashing `\-') 2519095Smckusickare placed on new lines in between the normal output lines. 2643082Scael.Pp 2743082Scael.Tp Fl 2843082ScaelSuppress all underlining. 2919095SmckusickIt is especially useful for previewing 3043082Scael.Ar allboxed 3119095Smckusicktables from 3243082Scael.Xr tbl 1 . 3343082Scael.Pp 3443082Scael.Tp Fl 2 3543082ScaelCauses all half-lines to be printed, effectively double spacing the output. 3619095SmckusickNormally, a minimal space output format is used which will suppress empty 3719095Smckusicklines. 3819095SmckusickThe program never suppresses two consecutive empty lines, however. 3919095SmckusickThe 4043082Scael.Fl 2 4119095Smckusickoption is useful for sending output to the line printer when the output 4219095Smckusickcontains superscripts and subscripts which would otherwise be invisible. 4343082Scael.Tp 4443082Scael.Pp 4519095SmckusickA typical use of 4643082Scael.Nm colcrt 4719095Smckusickwould be 4843082Scael.Pp 49*44912Scael.Dl tbl exum2.n \&| nroff \-ms \&| colcrt \- \&| more 5043082Scael.Sh SEE ALSO 5143082Scael.Xr nroff 1 , 5243082Scael.Xr troff 1 , 5343082Scael.Xr col 1 , 5443082Scael.Xr more 1 , 5543082Scael.Xr ul 1 5643082Scael.Sh HISTORY 5743082ScaelAppeared in 3 BSD. 5843082Scael.Sh BUGS 5919095SmckusickShould fold underlines onto blanks even with the 6043082Scael.Fl 6119095Smckusickoption so that 6219095Smckusicka true underline character would show; if we did this, however, 6343082Scael.Nm colcrt 6419095Smckusickwouldn't get rid of 6543082Scael.Ar cu'd 6619095Smckusickunderlining 6719095Smckusickcompletely. 6843082Scael.Pp 6919095SmckusickCan't back up more than 102 lines. 7043082Scael.Pp 7119095SmckusickGeneral overstriking is lost; 72*44912Scaelas a special case `\&|' overstruck with `\-' or underline becomes `+'. 7343082Scael.Pp 7419095SmckusickLines are trimmed to 132 characters. 7543082Scael.Pp 7619095SmckusickSome provision should be made for processing superscripts and subscripts 7719095Smckusickin documents which are already double-spaced. 78