diff --git a/sections/Theorie.tex b/sections/Theorie.tex
index 740c78c..74c5cc8 100755
--- a/sections/Theorie.tex
+++ b/sections/Theorie.tex
@@ -142,12 +142,12 @@ Zur näherungsweisen Verarbeitung der Differentialgleichung wird hier das Variat
   \fill[color=black!5] (0,0,1) -- (1,0,1) -- (1,1,1) -- (0,1,1) -- cycle;
   
   \draw[color=black!50] (0,0,1) -- (1,0,1);
-  \draw[color=black!50] (0,0,1) -- (0,1,1);
+  \draw[color=black!50] (0,0,1) -- node[below left,color=black]{$\dif z$} (0,1,1);
   \draw[color=black!50] (1,0,1) -- (1,0,0);
     
-  \draw[color=black!50] (0,1,1) -- (0,1,0);
+  \draw[color=black!50] (0,1,1) -- node[above left=-4pt and -4pt,color=black]{$\dif y$} (0,1,0);
   \draw[color=black!50] (1,0,0) -- (1,1,0);
-  \draw[color=black!50] (0,1,0) -- (1,1,0);
+  \draw[color=black!50] (0,1,0) -- node[above left,color=black]{$\dif x$} (1,1,0);
     
   \draw[color=black!50] (0,1,1) -- (1,1,1);
   \draw[color=black!50] (1,0,1) -- (1,1,1);