diff --git a/Developer-Tools.md b/Developer-Tools.md
index 810ed27..f12e618 100644
--- a/Developer-Tools.md
+++ b/Developer-Tools.md
@@ -7,6 +7,9 @@ For those of you interested in extending osxphotos, using osxphotos to build you
 - `osxphotos install`
 - `osxphotos uninstall`
 
+These can be viewed using the command:
+
+`OSXPHOTOS_SHOW_HIDDEN=1 osxphotos help`
 
 ## repl