diff --git a/plantuml/plantuml.config b/plantuml/plantuml.config
index 618a5205..069c6ae1 100644
--- a/plantuml/plantuml.config
+++ b/plantuml/plantuml.config
@@ -4,26 +4,59 @@ skinparam padding 5
 skinparam nodesep 60
 skinparam ranksep 80
 <style>
-root {
-  FontName "Noto Sans Regular"
-  FontSize 14
-  RoundCorner 10
-  LineThickness 1.5
-  BackGroundColor transparent
-}
-arrow {
-  Color #666666
-  LineThickness 2
-}
-wbsDiagram {
-  Linecolor lightgray
+  root {
+    FontName "Noto Sans Regular"
+    FontSize 12
+    RoundCorner 10
+    LineThickness 1.5
+    BackGroundColor transparent
+  }
   node {
     BackgroundColor lightgray
   }
   arrow {
-    LineColor lightgray
+    Color #666666
+    LineThickness 2
+  }
+  group {
+    BackgroundColor lightgray
+    LineColor gray
+    FontStyle italic
+  }
+  note {
+    BackgroundColor yellow
+    LineColor orange
+    FontSize 12
+  }
+
+  activityDiagram {
+    BackgroundColor lightgray
+    diamond {
+      BackgroundColor lightgray
+    }
+    partition {
+      BackgroundColor transparent
+    }
+  }
+
+  sequenceDiagram {
+    Linecolor lightgray
+    participant {
+      BackgroundColor lightgray
+    }
+  }
+  wbsDiagram {
+    Linecolor lightgray
+    node {
+      BackgroundColor lightgray
+    }
+    arrow {
+      LineColor lightgray
+    }
+  }
+  document {
+     BackgroundColor transparent
   }
-}
 </style>
 skinparam handwritten false
 skinparam shadowing false