|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.|
tbl exum2.n | nroff -ms | colcrt - | more
Cant 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.