diff --git a/report.tex b/report.tex
index 61eee13..c96e231 100644
--- a/report.tex
+++ b/report.tex
@@ -240,7 +240,7 @@
   \begin{frame}{Searching for a first order Z4c}{Why Z4c?}
     \section{Searching for a first order Z4c}
     \subsection{Why Z4c?}
-    Let's look at the relationship between different formulations of Einstein's equations:
+    Let's look at the relationship between different mainly used formulations of Einstein's equations:
     \begin{figure}
       \centering
       \begin{tikzpicture}[
@@ -281,6 +281,7 @@
 
       % \node[draw=none, above=1mm of gh, font=\scriptsize] {full first order};
       \end{tikzpicture}
+      \caption{evolution systems}
     \end{figure}
   \end{frame}