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30 .\" @(#)colcrt.1 8.1 (Berkeley) 6/30/93
37 .Nd filter nroff output for CRT previewing
45 provides virtual half-line and reverse line feed sequences
46 for terminals without such capability, and on which overstriking
48 Half-line characters and underlining (changed to dashing `\-')
49 are placed on new lines in between the normal output lines.
54 Suppress all underlining.
55 This option is especially useful for previewing
60 Causes all half-lines to be printed, effectively double spacing the output.
61 Normally, a minimal space output format is used which will suppress empty
63 The program never suppresses two consecutive empty lines, however.
66 option is useful for sending output to the line printer when the output
67 contains superscripts and subscripts which would otherwise be invisible.
74 tbl exum2.n \&| nroff \-ms \&| colcrt \- \&| more
88 Should fold underlines onto blanks even with the
91 a true underline character would show.
93 Can't back up more than 102 lines.
95 General overstriking is lost;
103 Lines are trimmed to 132 characters.
105 Some provision should be made for processing superscripts and subscripts
106 in documents which are already double-spaced.