diff --git a/docs/cli.md b/docs/cli.md
index eabc082..f9597ae 100644
--- a/docs/cli.md
+++ b/docs/cli.md
@@ -11,6 +11,13 @@ Online help is available using the `--help` option.
 
 The `tsunzip` program is an alias for `tszip -d`.
 
+To compress or decompress a single file to a different filename, redirect stdout to a new file:
+
+```sh
+tszip -c myfile.trees > compressed.tsz
+tsunzip -c compressed.tsz > duplicate_myfile.trees
+```
+
 ## tszip
 
 ```{argparse}