diff --git a/lam/docs/manual-sources/howto.xml b/lam/docs/manual-sources/howto.xml
index e813eb96..af6df903 100644
--- a/lam/docs/manual-sources/howto.xml
+++ b/lam/docs/manual-sources/howto.xml
@@ -6469,7 +6469,7 @@ OK (10 msec)</programlisting>
       <screenshot>
         <mediaobject>
           <imageobject>
-            <imagedata fileref="images/conf1.jpg" />
+            <imagedata fileref="images/conf1.png" />
           </imageobject>
         </mediaobject>
       </screenshot>
@@ -6480,7 +6480,7 @@ OK (10 msec)</programlisting>
       <screenshot>
         <mediaobject>
           <imageobject>
-            <imagedata fileref="images/conf2.jpg" />
+            <imagedata fileref="images/conf2.png" />
           </imageobject>
         </mediaobject>
       </screenshot>
@@ -6491,7 +6491,7 @@ OK (10 msec)</programlisting>
       <screenshot>
         <mediaobject>
           <imageobject>
-            <imagedata fileref="images/conf3.jpg" />
+            <imagedata fileref="images/conf3.png" />
           </imageobject>
         </mediaobject>
       </screenshot>
@@ -6514,7 +6514,7 @@ OK (10 msec)</programlisting>
         <screenshot>
           <mediaobject>
             <imageobject>
-              <imagedata fileref="images/conf4.jpg" />
+              <imagedata fileref="images/conf4.png" />
             </imageobject>
           </mediaobject>
         </screenshot>
@@ -6664,7 +6664,7 @@ OK (10 msec)</programlisting>
         <screenshot>
           <mediaobject>
             <imageobject>
-              <imagedata fileref="images/conf5.jpg" />
+              <imagedata fileref="images/conf5.png" />
             </imageobject>
           </mediaobject>
         </screenshot>
@@ -7124,7 +7124,7 @@ OK (10 msec)</programlisting>
         <screenshot>
           <mediaobject>
             <imageobject>
-              <imagedata fileref="images/conf6.jpg" />
+              <imagedata fileref="images/conf6.png" />
             </imageobject>
           </mediaobject>
         </screenshot>
diff --git a/lam/docs/manual-sources/images/conf1.jpg b/lam/docs/manual-sources/images/conf1.jpg
deleted file mode 100644
index 5ba3b40b..00000000
Binary files a/lam/docs/manual-sources/images/conf1.jpg and /dev/null differ
diff --git a/lam/docs/manual-sources/images/conf1.png b/lam/docs/manual-sources/images/conf1.png
new file mode 100644
index 00000000..729b0aea
Binary files /dev/null and b/lam/docs/manual-sources/images/conf1.png differ
diff --git a/lam/docs/manual-sources/images/conf2.jpg b/lam/docs/manual-sources/images/conf2.jpg
deleted file mode 100644
index a2ad71e0..00000000
Binary files a/lam/docs/manual-sources/images/conf2.jpg and /dev/null differ
diff --git a/lam/docs/manual-sources/images/conf2.png b/lam/docs/manual-sources/images/conf2.png
new file mode 100644
index 00000000..ddb3511b
Binary files /dev/null and b/lam/docs/manual-sources/images/conf2.png differ
diff --git a/lam/docs/manual-sources/images/conf3.jpg b/lam/docs/manual-sources/images/conf3.jpg
deleted file mode 100644
index 3908d8d3..00000000
Binary files a/lam/docs/manual-sources/images/conf3.jpg and /dev/null differ
diff --git a/lam/docs/manual-sources/images/conf3.png b/lam/docs/manual-sources/images/conf3.png
new file mode 100644
index 00000000..00f35bef
Binary files /dev/null and b/lam/docs/manual-sources/images/conf3.png differ
diff --git a/lam/docs/manual-sources/images/conf4.jpg b/lam/docs/manual-sources/images/conf4.jpg
deleted file mode 100644
index f32c53fc..00000000
Binary files a/lam/docs/manual-sources/images/conf4.jpg and /dev/null differ
diff --git a/lam/docs/manual-sources/images/conf4.png b/lam/docs/manual-sources/images/conf4.png
new file mode 100644
index 00000000..ecc92b0e
Binary files /dev/null and b/lam/docs/manual-sources/images/conf4.png differ
diff --git a/lam/docs/manual-sources/images/conf5.jpg b/lam/docs/manual-sources/images/conf5.jpg
deleted file mode 100644
index 65ee227a..00000000
Binary files a/lam/docs/manual-sources/images/conf5.jpg and /dev/null differ
diff --git a/lam/docs/manual-sources/images/conf5.png b/lam/docs/manual-sources/images/conf5.png
new file mode 100644
index 00000000..9a7044e6
Binary files /dev/null and b/lam/docs/manual-sources/images/conf5.png differ
diff --git a/lam/docs/manual-sources/images/conf6.jpg b/lam/docs/manual-sources/images/conf6.jpg
deleted file mode 100644
index 2da65304..00000000
Binary files a/lam/docs/manual-sources/images/conf6.jpg and /dev/null differ
diff --git a/lam/docs/manual-sources/images/conf6.png b/lam/docs/manual-sources/images/conf6.png
new file mode 100644
index 00000000..9b0d7f43
Binary files /dev/null and b/lam/docs/manual-sources/images/conf6.png differ