@item -e, --edit
Apply the conversions direct to the input file, modifying it
-in-place.
+in-place. The original file is renamed as @file{myfile.ly~}. This
+backup file may be a hidden file on some operating systems.
+
+@item -b, --backup-numbered
+When used with the @samp{-e} option, number the backup files so that
+no previous version is overwritten. The backup files may be hidden
+on some operating systems.
@item -f, --from=@var{from-patchlevel}
Set the version to convert from. If this is not set, @command{convert-ly}