sourCEntral -   <div class="manpages" id="manpage"> <a href="%$(PREFIX)$%1+COLCRT">COLCRT(1)</a> BSD General Commands Manual <a href="%$(PREFIX)$%1+COLCRT">COLCRT(1)</a> NAME colcrt — filter nroff output for CRT previewing SYNOPSIS colcrt [−] [−2] [file ...] DESCRIPTION Colcrt provides virtual half-line and reverse line feed sequences for terminals without such capability, and on which overstriking is destructive. Half-line characters and underlining (changed to dashing ‘−’) are placed on new lines in between the normal output lines. Available options: − Suppress all underlining. This option is especially useful for previewing allboxed tables from <a href="%$(PREFIX)$%1+tbl">tbl(1)</a>. −2 Causes all half-lines to be printed, effectively double spacing the output. Normally, a minimal space output format is used which will suppress empty lines. The program never suppresses two consecutive empty lines, however. The −2 option is useful for sending output to the line printer when the output contains superscripts and subscripts which would otherwise be invisible. EXAMPLES A typical use of colcrt would be tbl exum2.n | nroff −ms | colcrt − | more SEE ALSO <a href="%$(PREFIX)$%1+nroff">nroff(1)</a>, <a href="%$(PREFIX)$%1+troff">troff(1)</a>, <a href="%$(PREFIX)$%1+col">col(1)</a>, <a href="%$(PREFIX)$%1+more">more(1)</a>, <a href="%$(PREFIX)$%1+ul">ul(1)</a> BUGS Should fold underlines onto blanks even with the ‘−’ option so that a true underline character would show. Can’t back up more than 102 lines. General overstriking is lost; as a special case ‘|’ overstruck with ‘−’ or underline becomes ‘+’. Lines are trimmed to 132 characters. Some provision should be made for processing superscripts and subscripts in documents which are already double-spaced. HISTORY The colcrt command appeared in 3.0BSD. 3rd Berkeley Distribution June 30, 1993 3rd Berkeley Distribution </div>

Colcrt provides virtual half-line and reverse line feed sequences for terminals without such capability, and on which overstriking is destructive. Half-line characters and underlining (changed to dashing ‘−’) are placed on new lines in between the normal output lines.

Available options:

−

Suppress all underlining. This option is especially useful for previewing allboxed tables from tbl(1).

−2

Causes all half-lines to be printed, effectively double spacing the output. Normally, a minimal space output format is used which will suppress empty lines. The program never suppresses two consecutive empty lines, however. The −2 option is useful for sending output to the line printer when the output contains superscripts and subscripts which would otherwise be invisible.

EXAMPLES

A typical use of colcrt would be

tbl exum2.n | nroff −ms | colcrt − | more

BUGS

Should fold underlines onto blanks even with the ‘−’ option so that a true underline character would show.

Can’t back up more than 102 lines.

General overstriking is lost; as a special case ‘|’ overstruck with ‘−’ or underline becomes ‘+’.

Lines are trimmed to 132 characters.

Some provision should be made for processing superscripts and subscripts in documents which are already double-spaced.

HISTORY

The colcrt command appeared in 3.0BSD.

3rd Berkeley Distribution June 30, 1993 3rd Berkeley Distribution

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