@Chapter
    @Title { Tables }
    @Tag { tables }
@Begin
@LP
This chapter explains how to produce tables like this one:
tables. @Index { tables }
@CD @Tbl
   aindent { ctr }
   arulebelow { double }
   aformat { @StartHSpan @Cell @B X | | @HSpan }
   bindent { align }
   bformat { @Cell rr { no } @I A | @Cell rl { no } B | @Cell C }
   rule { yes }
{
@Rowa
   X { Value of mathematical formulae (millions of dollars) }
@Rowb
   A { Quadratic formula }
   B { @M { x ^= { minus b +- sqrt { b sup 2 - 4ac } } over 2a } }
   C { 3^.5 }
@Rowb
   A { Binomial theorem }
   B { @M { ( a + b ) sup n ^= sum from { k=0 } to { infty }
pmatrix { row ccol n row ccol k } a sup k b sup n-k
} }
   C { 12^ }
}
As the example shows, the tables may contain spanning columns, aligned
columns, and rules, and the cells may contain arbitrary objects.
@FootNote {
There has been a slight change to {@Code "@Tbl"}, starting with Version
3.18:  if you want columns whose entries are aligned (on decimal points,
equals signs, etc.), or the analogous thing with rows, you have to ask
for it now, whereas before it happened automatically.  See
Section {@NumberOf tbl_alig} for the details.
}
@BeginSections

@Include { tbl_intr } # introduction
@Include { tbl_cell } # cell formatting: font, break, width, paint
@Include { tbl_rows } # row formats and the @Row symbol
@Include { tbl_rule } # rules
@Include { tbl_marg } # margins
@Include { tbl_widt } # width and height
@Include { tbl_inde } # indenting and struts
@Include { tbl_alig } # aligned columns and headings over them
@Include { tbl_span } # spanning columns and rows
@Include { tbl_mark } # @MarkRow
@Include { tbl_mult } # multi-page tables
@Include { tbl_plai } # plain text tables
@Include { tbl_setu } # setup file options
@Include { tbl_summ } # summary

@EndSections
@End @Chapter