Update README.md

cwmeijer · web-flow · commit 539c576e9d0f · 2018-07-31T12:59:59.000+02:00
diff --git a/README.md b/README.md
@@ -85,6 +85,8 @@ Tested for correctness using a simple case with artificial data against manually
 Tested for correctness on artificial data.
 
 
+**Volumes**
+
 The following volume types are supported:
 - Infinite cylinder
 - Sphere
