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diff --git a/finddup.1 b/finddup.1
index 8ab867c..e021a81 100644
--- a/finddup.1
+++ b/finddup.1
@@ -19,6 +19,17 @@ files found in it. With two directories, it prints either the files
 common to both DIR1 and DIR2, or with the `not:' prefix, the ones
 present in DIR1 and not in DIR2.
 
+It compares files by first comparing their sizes, hence goes
+reasonably fast.
+
+When looking for identical files, \fBfinddup\fP associates by default
+a group ID to every content, and prints it along the file names.
+
+Note that
+.B finddup DIR
+is the same as
+.B finddup -i DIR DIR
+
 .SH "OPTIONS"
 .TP
 \fB-h\fR
@@ -27,53 +38,61 @@ display help and exit
 \fB-d\fR
 ignore files and directories starting with a dot
 .TP
+\fB-0\fR
+ignore empty files
+.TP
 \fB-c\fR
 do not show which files from DIR2 corresponds to files from DIR1
+(hence, show only the files from DIR1 which have an identical twin in
+DIR2)
 .TP
 \fB-g\fR
-do not show the file group IDs (one group for each content)
+do not show the file group IDs
 .TP
 \fB-p\fR
 show progress information in stderr
 .TP
 \fB-r\fR
-shows the real path of the files
+show the real path of the files
+.TP
+\fB-i\fR
+files with same inode are considered as different
 
 .SH "BUGS"
 
 None known, probably many. Valgrind does not complain though.
 
-While not a bug per se, the format of the output should definitely be
-improved. Not clear how.
+.SH "WISH LIST"
+
+The format of the output should definitely be improved. Not clear how.
+
+The comparison algorithm could definitely use some MD5 kind of
+signature. However, I doubt it would improve speed much.
+
+Their should be some fancy option to link two instances of the command
+running on different machines to reduce network disk accesses.
 
 .SH "EXAMPLES"
-.nf
+
 .B finddup -cg blah something
 
 .fi
-List files found in
-.B ./blah/
-which have a matching file with exact same content in
-.B ./something/
-without the group IDs
+List files found in \fB./blah/\fR which have a matching file with same
+content in \fB./something/\fR. Do not display the group IDs.
 
 .P
-.B finddup ./sources not:./backup
+.B finddup sources not:/mnt/backup
 
 .fi
-List all files found in
-.B ./sources/
-which do not have content-matching equivalent in
-.B ./backup.sources
+List all files found in \fB./sources/\fR which do not have
+content-matching equivalent in \fB/mnt/backup\fR.
 
 .P
-.B finddup ./tralala ./cuicui | sort -n
+.B finddup tralala cuicui
 
 .fi
 List groups of files with same content which exist both in
-.B ./tralala/
-and
-.B ./cuicui/
+\fB./tralala/\fR and \fB./cuicui/\fR.
 
 .SH "AUTHOR"