.ftB
.nf
Predefined General Number Registers
.ft
.TS
c2l
c2l2l
n2l2l.
.ftI
.bd I 3
Section	Register
Reference	Name	Description
.ftR
.bd I
.xx
3	\fB%\fR	Current page number.
11.2	\fBct\fR	Character type (set by \fIwidth\fR function).
7.4	\fBdl\fR	Width (maximum) of last completed diversion.
7.4	\fBdn\fR	Height (vertical size) of last completed diversion.
-	\fBdw\fR	Current day of the week (1-7).
-	\fBdy\fR	Current day of the month (1-31).
11.3	\fBhp\fR	Current horizontal place on \fIinput\fR line.
15	\fBln\fR	Output line number.
-	\fBmo\fR	Current month (1-12).
4.1	\fBnl\fR	Vertical position of last printed text base-line.
11.2	\fBsb\fR	Depth of string below base line (generated by \fIwidth\fR function).
11.2	\fBst\fR	Height of string above base line (generated by \fIwidth\fR function).
-	\fByr\fR	Last two digits of current year.
.TE
.sp
.ftB
Predefined Read-Only Number Registers
.ftR
.TS
c2l
c2l2l
n2l2l.
.ftI
.bd I 3
Section	Register
Reference	Name	Description
.ftR
.bd I
.xx
7.3	\fB&$\fR	Number of arguments available at the current macro level.
-	\fB&A\fR	Set to 1 in \*(TR, if \fB\-a\fR option used; always 1 in \*(NR.
11.1	\fB&H\fR	Available horizontal resolution in basic units.
-	\fB&T\fR	Set to 1 in \*(NR, if \fB\-T\fR option used; always 0 in \*(TR.
11.1	\fB&V\fR	Available vertical resolution in basic units.
5.2	\fB&a\fR	Post-line extra line-space most recently utilized \
using \fB\ex\fI\'N\|\'\fR.
-	\fB&c\fR	Number of \fIlines\fR read from current input file.
7.4	\fB&d\fR	Current vertical place in current diversion; equal to \fBnl\fR, if no diversion.
2.2	\fB&f\fR	Current font as physical quadrant (1-4).
4	\fB&h\fR	Text base-line high-water mark on current page or diversion.
6	\fB&i\fR	Current indent.
6	\fB&l\fR	Current line length.
4	\fB&n\fR	Length of text portion on previous output line.
3	\fB&o\fR	Current page offset.
3	\fB&p\fR	Current page length.
2.3	\fB&s\fR	Current point size.
7.5	\fB&t\fR	Distance to the next trap.
4.1	\fB&u\fR	Equal to 1 in fill mode and 0 in nofill mode.
5.1	\fB&v\fR	Current vertical line spacing.
11.2	\fB&w\fR	Width of previous character.
-	\fB&x\fR	Reserved version-dependent register.
-	\fB&y\fR	Reserved version-dependent register.
7.4	\fB&z\fR	Name of current diversion.
.TE
