| . \" DS - display. If .DS C, center; L, left-adjust; I, indent. | |
| .de DS | |
| .KS | |
| .nf | |
| .\\$1D \\$2 \\$1 | |
| .ft 1 | |
| .ps \\n(PS | |
| .if \\n(VS>40 .vs \\n(VSu | |
| .if \\n(VS<=39 .vs \\n(VSp | |
| .. | |
| .de D | |
| .ID \\$1 | |
| .. | |
| .de CD | |
| .XD | |
| .ce 1000 | |
| .. | |
| .de ID | |
| .XD | |
| .if t .in +0.5i | |
| .if n .in +8 | |
| .if \\n(.$ .if !"\\$1"I" .if !"\\$1"" .in \\n(OIu | |
| .if \\n(.$ .if !"\\$1"I" .if !"\\$1"" .in +\\$1n | |
| .. | |
| .de LD | |
| .XD | |
| .. | |
| .de XD | |
| .nf | |
| .nr OI \\n(.i | |
| .SP \\n(DVu | |
| .sp \\n(DVu | |
| .. | |
| . \" BD - block display: save everything, then center it. | |
| .de BD | |
| .XD | |
| .nr BD 1 | |
| .nf | |
| .in \\n(OIu | |
| .di DD | |
| .. | |
| . \"DE - display end | |
| .de DE | |
| .ce 0 | |
| .if \\n(BD>0 .DF | |
| .nr BD 0 | |
| .in \\n(OIu | |
| .KE | |
| .SP \\n(DVu | |
| .sp \\n(DVu | |
| .fi | |
| .. | |
| . \" DF - finish a block display to be recentered. | |
| .de DF | |
| .di | |
| .if \\n(dl>\\n(BD .nr BD \\n(dl | |
| .if \\n(BD<\\n(.l .in (\\n(.lu-\\n(BDu)/2u | |
| .nr EI \\n(.l-\\n(.i | |
| .ta \\n(EIuR | |
| .nf | |
| .DD | |
| .in \\n(OIu | |
| .. |