diff --git a/doc/ctlseqs.texi b/doc/ctlseqs.texi
index a376456..470fd2b 100644
--- a/doc/ctlseqs.texi
+++ b/doc/ctlseqs.texi
@@ -252,8 +252,6 @@ configure a matcher.
 @example
 struct ctlseqs_matcher *matcher /* = ... */;
 char const *patterns[] = @{
-    CTLSEQS_XTVERSION(),
-    CTLSEQS_CUP(CTLSEQS_PH_NUM, CTLSEQS_PH_NUM),
     // ...
 @};
 struct ctlseqs_matcher_options options = @{
@@ -280,6 +278,69 @@ invalid, function behaviour is undefined. See @ref{Patterns} for details.
 @node Patterns
 @subsection Patterns
 
+The @code{patterns} field in @code{struct ctlseqs_matcher_options} is an array
+of NUL-terminated strings which indicates the desired patterns of control
+functions for the current matcher.
+
+@cindex Control functions supported by the matcher
+The following types of control functions are recognizable by the matcher:
+
+@itemize @bullet
+@item Control sequences: @code{CSI [param...] [intmd...] final}
+@item C1 functions with command string: @code{(APC|DCS|OSC|PM) [cmdstr] ST}
+@item Single shifts: @code{(SS2|SS3) ch}
+@item SOS function: @code{SOS [chrstr] ST}
+@end itemize
+
+According to ECMA-48, CSI parameter bytes are of range @code{0x30} to
+@code{0x3f}, intermediate bytes @code{0x20} to @code{0x2f}, and final byte
+@code{0x40} to @code{0x7e}. Command string consists of printable characters and
+characters of range @code{0x08} and @code{0x0e}. Character string can be any
+bit combination which does not represent @code{SOS} or @code{ST}.
+
+A supported control function, either verbatim or combined with placeholders,
+can be specified as a valid pattern. The terminating @code{NUL} character does
+not count into the pattern.
+
+@cindex List of supported placeholders
+A placeholder can only take place in the @code{param}, @code{intmd},
+@code{cmdstr} or @code{chrstr} fields, and can be one of the following values:
+
+@itemize @bullet
+@item @code{CTLSEQS_PH_NUM}: A single unsigned integer.
+@item @code{CTLSEQS_PH_NUMS}: An unsigned integer indicating the number of
+extracted values, followed by unsigned integers of that many.
+@item @code{CTLSEQS_PH_STR}: An unsigned integer indicating the number of
+characters of the extracted string, followed by a string of printable
+characters.
+@item @code{CTLSEQS_PH_CMDSTR}: An unsigned integer indicating the number of
+characters of the extracted string, followed by a string containing only
+printable characters and characters of range @code{0x08} to @code{0x0d}.
+@item @code{CTLSEQS_PH_CSI_PARAM}: An unsigned integer indicating the number of
+characters of the extracted string, followed by a string of CSI parameter
+bytes.
+@item @code{CTLSEQS_PH_CSI_INTMD}: An unsigned integer indicating the number of
+characters of the extracted string, followed by a string of CSI intermediate
+bytes.
+@item @code{CTLSEQS_PH_HEXNUM}: A single unsigned integer, which is the integer
+value of extracted hexadecimal string.
+@item @code{CTLSEQS_PH_CHRSTR}: An unsigned integer indicating the number of
+characters of the extracted string, followed by a string of any bit combination
+which does not represent @code{SOS} or @code{ST}.
+@end itemize
+
+@cindex Control sequence matcher pattern example
+The following code is a valid example of patterns:
+
+@example
+const char *patterns[] = @{
+    CTLSEQS_XTVERSION(),
+    CTLSEQS_CUP(CTLSEQS_PH_NUM, CTLSEQS_PH_NUM),
+    CTLSEQS_DECRQM("1000"),
+    // ...
+@};
+@end example
+
 
 @node Matching String
 @section Matching String