\l'\n(.lu'
.xx
 Notes-
.xx
 B Request normally causes a break.
 D Mode or relevant parameters associated with current diversion level.
 E Relevant parameters are a part of the current environment.
 O Must stay in effect until logical output.
 P Mode must be still or again in effect at the time of physical output.
 v,p,m,u Default scale indicator; if not specified, scale indicators are ignored.

.nr zz 11
. po +\\n(.lu/\n(zzu
. rt
.\}
.po 26i/27u
.\}
..
.nr cl 0 1
.di zz
.vs 10
ab 20
ad 4
af 8
am 7
as 7
bd 2
bp 3
br 4
c2 10
cc 10
ce 4
ch 7
cs 2
cu 10
da 7
de 7
di 7
ds 7
dt 7
ec 10
el 16
em 7
eo 10
ev 17
ex 18
fc 9
fi 4
fl 20
fp 2
ft 2
fz 2
hc 13
hw 13
hy 13
ie 16
if 16
ig 20
in 6
it 7
lc 9
lg 10
li 10
ll 6
ls 5
lt 14
mc 20
mk 3
na 4
ne 3
nf 4
nh 13
nm 15
nn 15
nr 8
ns 5
nx 19
os 5
pc 14
pi 19
pl 3
pm 20
pn 3
po 3
ps 2
rd 18
rm 7
rn 7
rr 8
rs 5
rt 3
so 19
sp 5
ss 2
sv 5
ta 9
tc 9
ti 6
tl 14
tm 20
tr 10
uf 10
ul 10
vs 5
wh 7
.di
.nr aa \n(dn/\n(zz
Alphabetical Request and Section Number Cross Reference
.wh \n(nlu+\n(aau cl
.nr qq \n(nlu+\n(aau
.vs

.zz
.ch cl 12i
.bp
Escape Sequences for Characters, Indicators, and Functions
.xx



.bd I 3
Section Escape
Reference Sequence Meaning
.bd I
.xx
10.1 \e\e \e (to prevent or delay the interpretation of \e\|)
10.1 \ee Printable version of the current escape character.
2.1 \e\' \' (acute accent); equivalent to \e(aa
2.1 \e\` \` (grave accent); equivalent to \e(ga
2.1 \e- - Minus sign in the current font
7 \e\^. Period (dot) (see de)
11.1 \e(space) Unpaddable space-size space character
11.1 \e0 Digit width space
.tr ||
11.1 \e\|| 1\(sl6\|em narrow space character (zero width in \*(NR)
.tr |
11.1 \e^ 1\(sl12\|em half-narrow space character (zero width in \*(NR)
.tr &&
4.1 \e& Non-printing, zero width character
.tr &.
10.6 \e! Transparent line indicator
10.7 \e" Beginning of comment
7.3 \e$N Interpolate argument 1\(<=N\(<=9
13 \e% Default optional hyphenation character
2.1 \e(xx Character named xx
7.1 \e\(**x,|\e\(**(xx Interpolate string x or xx
9.1 \ea Non-interpreted leader character
12.3 \eb\'abc...\|\' Bracket building function
4.2 \ec Interrupt text processing
11.1 \ed Forward (down) 1\(sl2\|em vertical motion (1\(sl2 line in \*(NR)
2.2 \efx,\ef(xx,\efN Change to font named x or xx, or position N
11.1 \eh\'N|\' Local horizontal motion; move right N (negative left)
11.3 \ekx Mark horizontal input place in register x
12.4 \el\|\'Nc\|\' Horizontal line drawing function (optionally with c\|)
12.4 \eL\'Nc\|\' Vertical line drawing function (optionally with c\|)
8 \enx,\en(xx Interpolate number register x or xx
12.1 \eo\'abc...\|\' Overstrike characters a, b, c, ...
4.1 \ep Break and spread output line
11.1 \er Reverse 1\|em vertical motion (reverse line in \*(NR)
2.3 \esN,\|\es\(+-N Point-size change function
9.1 \et Non-interpreted horizontal tab
11.1 \eu Reverse (up) 1\(sl2\|em vertical motion (1\(sl2 line in \*(NR)
11.1 \ev\'N\|\|\' Local vertical motion; move down N (negative up)
11.2 \ew\'string\|\' Interpolate width of string
5.2 \ex\'N\|\|\' Extra line-space function (negative before, positive after)
12.2 \ezc Print c with zero width (without spacing)
16 \e{ Begin conditional input
16 \e} End conditional input
10.7 \e(newline) Concealed (ignored) newline
- \eX X, any character not listed above


The escape sequences
\e\e,
\e\^.,
\e",
\e$,
\e\(**,
\ea,
\en,
\et,
and
\e(newline) are interpreted in copy mode (\(sc7.2).
.bp
Predefined General Number Registers



.bd I 3
Section Register
Reference Name Description
.bd I
.xx
3 % Current page number.
19 c& Number of lines read from current input file.
11.2 ct Character type (set by width function).
7.4 dl Width (maximum) of last completed diversion.
7.4 dn Height (vertical size) of last completed diversion.
- dw Current day of the week (1-7).
- dy Current day of the month (1-31).
11.3 hp Current horizontal place on input line (not in ditroff)
15 ln Output line number.
- mo Current month (1-12).
4.1 nl Vertical position of last printed text base-line.
11.2 sb Depth of string below base line (generated by width function).
11.2 st Height of string above base line (generated by width function).
- yr Last two digits of current year.

Predefined Read-Only Number Registers



.bd I 3
Section Register
Reference Name Description
.bd I
.xx
7.3 &$ Number of arguments available at the current macro level.
- &A Set to 1 in \*(TR, if -a option used; always 1 in \*(NR.
11.1 &H Available horizontal resolution in basic units.
5.3 &L Set to current line-spacing (ls) parameter
- &P Set to 1 if the current page is being printed; otherwise 0.
- &T Set to 1 in \*(NR, if -T option used; always 0 in \*(TR.
11.1 &V Available vertical resolution in basic units.
5.2 &a Post-line extra line-space most recently utilized \
using \ex\'N\|\'.
19 &c Number of lines read from current input file.
7.4 &d Current vertical place in current diversion; equal to nl, if no diversion.
2.2 &f Current font as physical quadrant (1-4).
4 &h Text base-line high-water mark on current page or diversion.
6 &i Current indent.
4.2 &j Current adjustment mode and type.
4.1 &k Length of text portion on current partial output line.
6 &l Current line length.
4 &n Length of text portion on previous output line.
3 &o Current page offset.
3 &p Current page length.
2.3 &s Current point size.
7.5 &t Distance to the next trap.
4.1 &u Equal to 1 in fill mode and 0 in nofill mode.
5.1 &v Current vertical line spacing.
11.2 &w Width of previous character.
- &x Reserved version-dependent register.
- &y Reserved version-dependent register.
7.4 &z Name of current diversion.


.vs 12
.bp