diff --git a/custom/README.md b/custom/README.md
index 232df4a..6f7dbd6 100644
--- a/custom/README.md
+++ b/custom/README.md
@@ -30,3 +30,7 @@ show_<module_name>() { # save this module in a file with the name <module_name>.
   echo "$module"
 }
 ```
+
+To use the output of a command, use e.g. `local text="$(get_tmux_option "@catppuccin_test_text" "#(date +%T)")"`.
+
+To use the output of a script, use e.g. `local text="$(get_tmux_option "@catppuccin_test_text" "#($HOME/my_script.sh)")"`.