Better help

templates/index.html

@@ -44,6 +44,13 @@
 
 
 <div id=help>
+    <h3>Usage:</h3>
+    Click on the grid to make a new node
+    Ctrl-click a node to do a Hadamard
+    Select a node, then shift-click another node to do a CZ
+    Press space to rotate the grid
+
+
     <h3>API usage:</h3>
     GET https://abv.peteshadbolt.co.uk/graph -> JSON<br/>
     POST JSON -> https://abv.peteshadbolt.co.uk/graph