diff --git a/config/formatting.md b/config/formatting.md
index d869250112..0810c874b3 100644
--- a/config/formatting.md
+++ b/config/formatting.md
@@ -87,3 +87,10 @@ docker inspect --format "{{upper .Name}}" container
 docker inspect --format='{{range .NetworkSettings.Networks}}{{println .IPAddress}}{{end}}' container
 ```
 {% endraw %}
+
+# Hint
+
+To find out what data can be printed, show all content as json:
+```
+docker container ls --format='{{json .}}'
+```