diff --git a/src/macrogen/etc/styles.yaml b/src/macrogen/etc/styles.yaml
index fbfbb83..ef44cfd 100644
--- a/src/macrogen/etc/styles.yaml
+++ b/src/macrogen/etc/styles.yaml
@@ -34,8 +34,9 @@ edge:
     color: gray
     constraint: false
     style: dashed
-#  copy:
-#    color: lightblue
+  copy:
+    arrowhead: empty
+    penwidth: 0.5
 
   # additional style for conflicting edges
   delete: