diff --git a/cpdfmanual.pdf b/cpdfmanual.pdf
index bd4abd8..b829c02 100644
Binary files a/cpdfmanual.pdf and b/cpdfmanual.pdf differ
diff --git a/cpdfmanual.tex b/cpdfmanual.tex
index 0c4e3b9..f3a3e10 100644
--- a/cpdfmanual.tex
+++ b/cpdfmanual.tex
@@ -1280,9 +1280,10 @@ For historical reasons, Cpdf uses the Unix line ending character (LF) when writi
   \begin{framed}
   \small
   \noindent\verb!cpdf -merge in1.pdf [<range>] in2.pdf [<range>] [<more names/ranges>]!\\
-  \noindent\verb!     [-collate] [-retain-numbering] [-remove-duplicate-fonts]!\\
+  \noindent\verb!     [-collate] [-collate-n <n>] [-retain-numbering]!\\
   \noindent\verb!     [-merge-add-bookmarks [-merge-add-bookmarks-use-titles]]!\\
-  \noindent\verb!     [-process-struct-trees] [-subformat <subformat>]!\\
+  \noindent\verb!     [-remove-duplicate-fonts] [-process-struct-trees]!\\
+  \noindent\verb!     [-subformat <subformat>]!\\
   \noindent\verb!     -o out.pdf!
 
   \vspace{1.5mm}
@@ -1327,7 +1328,7 @@ the input pages in the order specified on the command line. Actually, the
 \noindent Merge maintains and merges bookmarks, named destinations, annotations, tagged PDF information, and so on. PDF features which cannot be merged are retained if they are from
 the document which first exhibits that feature.
 
-The \texttt{-collate} option collates pages: that is to say, it takes the first page from the first document and its range, then the first page from the second document and its range and so on. When all first pages have been taken, it begins on the second from each range, and so on.\index{pages!collate}\index{collation}
+The \texttt{-collate} option collates pages: that is to say, it takes the first page from the first document and its range, then the first page from the second document and its range and so on. When all first pages have been taken, it begins on the second from each range, and so on. To collate in chunks use, for example, \texttt{-collate-n 2}.\index{pages!collate}\index{collation}
 
 The \texttt{-retain-numbering} option keeps the PDF page numbering labels of
 each document intact, rather than renumbering the output pages from 1.