diff --git a/User-Manual%3A-Chapter-1.md b/User-Manual%3A-Chapter-1.md
index 1692a20..afdb172 100644
--- a/User-Manual%3A-Chapter-1.md
+++ b/User-Manual%3A-Chapter-1.md
@@ -43,10 +43,12 @@ The Settings tab allows you to change how the diagram looks, and parameter the a
 List of settings:
 <table>
     <thead>
-        <th>Icon</th>
-        <th>Name</th>
-        <th>Default value</th>
-        <th>Definition</th>
+        <tr>
+            <th>Icon</th>
+            <th>Name</th>
+            <th>Default value</th>
+            <th>Definition</th>
+        </tr>
     </thead>
     <tbody>
         <tr>