From a7c59ecbf5b37e8dac7e23e5056106d30b71d41c Mon Sep 17 00:00:00 2001
From: "John Ankarstr\\xf6m" <john@ankarstrom.se>
Date: Wed, 2 Jun 2021 22:11:39 +0200
Subject: re.tmac: Add comments, configurable options

---
 re.tmac | 35 +++++++++++++++++++++++++----------
 1 file changed, 25 insertions(+), 10 deletions(-)

diff --git a/re.tmac b/re.tmac
index 08b9920..f7a04fb 100644
--- a/re.tmac
+++ b/re.tmac
@@ -1,25 +1,40 @@
+.\" configurable options
+.\" --------------------
+.ds Sf C		\" font
+.nr Sp 8p		\" point size
+.nr Sv 11p		\" vertical spacing (leading)
+.nr St 8n		\" tab width
+.
+.\" setup
+.\" -----
+.nr FM -1v		\" ensure that footnotes fit
+.
+.\" macro definitions
+.\" -----------------
 .eo
+.\" Sr -- source code begin
 .de Sr
-. mk c
+. mk c			\" vertical position where text ends
 . if (\nb > \nc) .sp (\nbu - \ncu - 1v)
 . if (\nb > 0) .if (\nc > \nb) .sp 0.5v
 . if !(\nz = 1) .if (\np > 0) .if (\n% > \np) .sp -(\nbu - \ncu - 1.5v)
 . nf
-. ft C
-. ps -2p
-. vs -1p
-. ta 8n +8n +8n +8n +8n
+. ft \*(Sf
+. ps \n(Spu
+. vs \n(Svu
+. ta \n(Stu +\n(Stu +\n(Stu +\n(Stu +\n(Stu +\n(Stu
 . in 2.2i
-. mk a
-. nr p \n%
+. mk a			\" vertical position where source code begins
+. nr p \n%		\" current page number
 ..
+.\" Se -- source code end
 .de Se
-. mk b
+. mk b			\" vertical position where source code ends
 . rt (\nau - 7p)
 . nr z 0
 . if (\n% > \np) \{
-.  rt \n(HMu
-.  nr z 1
+.  rt \n(HMu		\" return to top of new page
+.  nr z 1		\" signal page break
 . \}
 . nr LL 2i
 . LP
-- 
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