-Output is normally written to stdout. To write to a file, use this option.
-An alternative would be to use pipes.
+output is normally written to standard output so it can be, for example, piped
+to btrfs receive. Use this option to write it to a file instead.
+--no-data::
+send in 'NO_FILE_DATA' mode
++
+The output stream does not contain any file
+data and thus cannot be used to transfer changes. This mode is faster and
+is useful to show the differences in metadata.
+
+-v|--verbose::
+enable verbose output, print generated commands in a readable form, (each
+occurrence of this option increases the verbosity level)
+-q|--quiet::
+suppress all messages except errors