diff --git a/cpdfcommand.ml b/cpdfcommand.ml
index a5578d8..bf3a4ce 100644
--- a/cpdfcommand.ml
+++ b/cpdfcommand.ml
@@ -3932,7 +3932,7 @@ let go () =
               let range = parse_pagespec pdf pagespec in
                 let pdf = Cpdf.crop_pdf ~box:"/ArtBox" xywhlist pdf range in
                   write_pdf false pdf
-      | _ -> error "crop: bad command line"
+      | _ -> error "art: bad command line"
       end
   | Some Bleed ->
       begin match args.inputs, args.out with
@@ -3942,7 +3942,7 @@ let go () =
               let range = parse_pagespec pdf pagespec in
                 let pdf = Cpdf.crop_pdf ~box:"/BleedBox" xywhlist pdf range in
                   write_pdf false pdf
-      | _ -> error "crop: bad command line"
+      | _ -> error "bleed: bad command line"
       end
   | Some Trim ->
       begin match args.inputs, args.out with
@@ -3952,7 +3952,7 @@ let go () =
               let range = parse_pagespec pdf pagespec in
                 let pdf = Cpdf.crop_pdf ~box:"/TrimBox" xywhlist pdf range in
                   write_pdf false pdf
-      | _ -> error "crop: bad command line"
+      | _ -> error "trim: bad command line"
       end
   | Some MediaBox ->
       begin match args.inputs, args.out with
diff --git a/cpdfmanual.pdf b/cpdfmanual.pdf
index d0ea089..1e113a9 100644
Binary files a/cpdfmanual.pdf and b/cpdfmanual.pdf differ
diff --git a/cpdfmanual.tex b/cpdfmanual.tex
index 9b04189..1e838a4 100644
--- a/cpdfmanual.tex
+++ b/cpdfmanual.tex
@@ -751,7 +751,8 @@ The encryption parameters described in Chapter \ref{encryption} may be added to
   \noindent\verb!     in.pdf [<range>] -o out.pdf!
 
   \vspace{1.5mm}
-  \small\noindent\verb!cpdf -hard-box [-fast] in.pdf [<range>] [-mediabox-if-missing] -o out.pdf!
+  \small\noindent\verb!cpdf -hard-box <boxname> [-fast] in.pdf [<range>]!\\
+  \small\noindent\verb!     [-mediabox-if-missing] -o out.pdf!
 
   \vspace{1.5mm}
   \small\noindent\verb!cpdf -show-boxes [-fast] in.pdf [<range>] -o out.pdf!