diff --git a/slides/model.md b/slides/model.md
index 76bef5a1ab6bba11c3dfc077d18f4e3c3c4e8448..4da2f8d80ac774453e67b178f22e656efa6cc69d 100644
--- a/slides/model.md
+++ b/slides/model.md
@@ -123,6 +123,7 @@ with
 - $\sigma:$ sub control volume face (scvf)
 
 ## Flux term
+<font size=8>
 ```cpp
 NumEqVector computeFlux(const Problem& problem,
                         const Element& element,
@@ -134,6 +135,7 @@ NumEqVector computeFlux(const Problem& problem,
     ...
 }
 ```
+</font>
 
 ## Flux term
 ```cpp