+or after a closing delimiter, the delimiter, its matching delimiter,
+and optionally the text between them are highlighted. To toggle Show
+Paren mode, type @kbd{M-x show-paren-mode}. To customize it, type
+@kbd{M-x customize-group @key{RET} paren-showing}. The customizable
+options which control the operation of this mode include:
+
+@itemize @bullet
+@item
+@code{show-paren-highlight-open-paren} controls whether to highlight
+an open paren when point stands just before it, and hence its position
+is marked by the cursor anyway. The default is non-@code{nil} (yes).
+
+@item
+@code{show-paren-style} controls whether just the two parens, or also
+the space between them get highlighted. The valid options here are
+@code{parenthesis} (show the matching paren), @code{expression}
+(highlight the entire expression enclosed by the parens), and
+@code{mixed} (highlight the matching paren if it is visible, the
+expression otherwise).
+
+@item
+@code{show-paren-when-point-inside-paren}, when non-@code{nil}, causes
+highlighting also when point is on the inside of a parenthesis.
+
+@item
+@code{show-paren-when-point-in-periphery}, when non-@code{nil}, causes
+highlighting also when point is in whitespace at the beginning or end
+of a line, and there is a paren at, respectively, the first or last,
+or the last, non-whitespace position on the line.
+@end itemize