Clarify interactivity

index.html

@@ -20,7 +20,16 @@
 			<h1>Visualizing Repo-level Dedupe</h1>
       <p>This visualization demonstrates the amount of <a target="_blank" rel="noopener noreferrer" href="https://huggingface.co/blog/from-files-to-chunks">chunk-level dedupe</a> across all public repos.</p>
       <p>"Dedupe factor" is defined as the number of re-uses of a given "xorb". A "xorb" is a collection of content-defined chunks, typically around 1,000 chunks comprising up to 64 MB of total data.</p>
-      <p>Click to select a row, and highlight all xorbs in other repos that have overlap with the selected repo. Double-click to clear selection.</p>
+      <p>Interactions:
+        <ul>
+          <li>
+            Hover to select a xorb, and highlight the same xorb in all other repos in <strong><span style="color: red">red</span></strong>.
+          </li>
+          <li>
+            Click to select a row (repo), and fade out all repos that don't contain any overlapping data. Double-click to clear selection.
+          </li>
+        </ul>
+      </p>
 		</div>
     <div id="vis"></div>
     <script>