Update the manual

1 files changed, 11 insertions, 9 deletions

diff --git a/smenu.1 b/smenu.1
index a0743ab..24e00ed 100644
--- a/smenu.1
+++ b/smenu.1
@@ -1465,20 +1465,22 @@ In column mode, this option is useful to restrict the selections to a
 subset of all columns.
 Either by including (nothing or \fIi\fP) or by excluding (\fIe\fP) them.
 
-The other letters \fIl\fP, \fIL\fP, \fIr\fP, \fIR\fP, \fIc\fP and \fIC\fP
-are useful to respectively align to the left, to the right or center the
-content columns (selected or not).
+The other letters (directives) \fIl\fP, \fIL\fP, \fIr\fP, \fIR\fP,
+\fIc\fP and \fIC\fP are useful to respectively align to the left, to
+the right or center the content columns (selected or not).
 
-Columns can be designated by their number (1 based) or by a regular
-expression enclosed in delimiters made from any non-blank ASCII character
-excluding the comma.
+Columns can be designated by their number (starting with 1) or by regular
+expressions surrounded by delimiters consisting of any printable ASCII
+character, except spaces and unprotected commas;
+commas can be protected by backslashes ('\fCD\\\fP')).
 
-Range of columns (number or RE) can be given by separated then with
-a dash.
+Column ranges are defined  by separating their numbers with a dash. Open
+interval to the left or right are allowed, so these interval descriptions
+may be preceded or followed by a dash (e.g. \f(CB5-7\fP, \f(CB-2\fP
+or \f(CB8-\fP are allowed).
 
 Multiple selectors can be regrouped in one argument using commas to
 separate them.
-A protected comma ('\\,') is not considered a delimiter.
 
 This option also accepts multiple arguments, each of them being a
 selector.