--- a/mercurial.tex
+++ b/mercurial.tex
@@ -123,17 +123,17 @@
 
   \bigskip
 
-  \begin{tikzpicture}
-    \begin{scope}[start chain]
-      \node<2->[on chain,left] at (0, 0.5) {hello.c};
-      \node<3->[on chain,xshift=-8mm, rev] {};
-      \node<4->[on chain,join,rev] {};
-      \node<5->[on chain,join,rev] {};
+  \begin{tikzpicture}[node distance=5mm]
+    \begin{scope}[start chain=hello]
+      \node<2->[on chain,rev,,label=left:hello.c:] {};
+      \node<3->[on chain,rev,join] {};
+      \node<4->[on chain,rev,join] {};
+      \node<6->[on chain,rev,join] {};
     \end{scope}
     \begin{scope}[start chain]
-      \node<2->[on chain,left] at (0, 0) {Makefile};
-      \node<3->[on chain,xshift=-8mm,rev] {};
-      \node<6->[on chain,join,rev] {};
+      \node<2->[on chain,rev,label=left:Makefile:,below=of hello-begin] {};
+      \node<5->[on chain,rev,join] {};
+      \node<7->[on chain,rev,join] {};
     \end{scope}
   \end{tikzpicture}
 \end{frame}
@@ -150,7 +150,7 @@
 
   \begin{center}
   \begin{tikzpicture}
-    \begin{scope}[start chain, node distance=16mm]
+    \begin{scope}[start chain, node distance=18mm]
       \node[working copy, on chain, label=above:Alice] (Alice)
            {hello.c\\ Makefile};
       \node[repository, on chain, label=above:CVS Server] (repository) {};
@@ -158,18 +158,15 @@
            {hello.c\\ Makefile};
     \end{scope}
 
-    \begin{scope}[scale=0.5,transform shape]
-      \begin{scope}[start chain]
-        \node[on chain,left, yshift=3mm, xshift=-2mm] at (repository)
-             {hello.c};
-        \node[on chain,xshift=-8mm,rev] {};
-        \node[on chain,join,rev] {};
+    \begin{scope}[scale=0.5,transform shape, node distance=5mm,
+        shift=(repository.center), yshift=4mm, xshift=3mm]
+      \begin{scope}[start chain=hello]
+        \node[on chain,rev,,label=left:hello.c:] {};
+        \node[on chain,rev,join] {};
       \end{scope}
       \begin{scope}[start chain]
-        \node[on chain,left, yshift=-3mm, xshift=-2mm] at (repository)
-             {Makefile};
-        \node[on chain,xshift=-8mm,rev] {};
-        \node<3->[on chain,join,rev] {};
+        \node[on chain,rev,label=left:Makefile:,below=of hello-begin] {};
+        \node<3->[on chain,rev,join] {};
       \end{scope}
     \end{scope}