diff --git a/Operating-Procedure.md b/Operating-Procedure.md
index 1a6be0c..cd47802 100644
--- a/Operating-Procedure.md
+++ b/Operating-Procedure.md
@@ -2,6 +2,13 @@
 
 Much of the operation is intended to be straight-forward, but this is where you can find the details of how to use the system.
 
+## Table of Contents
+
+1. [Mode Selection](#mode-selection)
+   1. [Automatic Mode Control](#automatic-mode-control)
+
+...
+
 ## Mode Selection
 
 <img width="142" alt="image" src="https://user-images.githubusercontent.com/2926271/221397090-a5fb3f1d-dd25-4f4f-9e2d-c11bd373daf2.png">