diff --git a/slides/about-us/training-courses.dia b/slides/about-us/training-courses.dia
index c6db1a797f..858900e749 100644
--- a/slides/about-us/training-courses.dia
+++ b/slides/about-us/training-courses.dia
@@ -2,10 +2,10 @@
 <dia:diagram xmlns:dia="http://www.lysator.liu.se/~alla/dia/">
   <dia:diagramdata>
     <dia:attribute name="background">
-      <dia:color val="#ffffffff"/>
+      <dia:color val="#ffffff"/>
     </dia:attribute>
     <dia:attribute name="pagebreak">
-      <dia:color val="#000099ff"/>
+      <dia:color val="#000099"/>
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     <dia:attribute name="paper">
       <dia:composite type="paper">
@@ -37,9 +37,6 @@
     </dia:attribute>
     <dia:attribute name="grid">
       <dia:composite type="grid">
-        <dia:attribute name="dynamic">
-          <dia:boolean val="true"/>
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         <dia:attribute name="width_x">
           <dia:real val="1"/>
         </dia:attribute>
@@ -56,7 +53,7 @@
       </dia:composite>
     </dia:attribute>
     <dia:attribute name="color">
-      <dia:color val="#d8e5e5ff"/>
+      <dia:color val="#d8e5e5"/>
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     <dia:attribute name="guides">
       <dia:composite type="guides">
@@ -64,27 +61,8 @@
         <dia:attribute name="vguides"/>
       </dia:composite>
     </dia:attribute>
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-        <dia:attribute name="snap-to-object">
-          <dia:boolean val="true"/>
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-        <dia:attribute name="show-grid">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-        <dia:attribute name="show-connection-points">
-          <dia:boolean val="true"/>
-        </dia:attribute>
-      </dia:composite>
-    </dia:attribute>
   </dia:diagramdata>
-  <dia:layer name="Background" visible="true" connectable="true" active="true">
+  <dia:layer name="Background" visible="true" active="true">
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@@ -105,10 +83,10 @@
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       </dia:attribute>
       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
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       <dia:attribute name="inner_color">
-        <dia:color val="#c7c6f5ff"/>
+        <dia:color val="#c7c6f5"/>
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         <dia:boolean val="true"/>
@@ -119,7 +97,7 @@
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       <dia:attribute name="obj_bb">
-        <dia:rectangle val="24.2638,11.9318;33.7362,16.0682"/>
+        <dia:rectangle val="24.5463,11.8201;33.4537,16.1799"/>
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@@ -135,10 +113,10 @@ development#</dia:string>
             <dia:real val="1.411111056804657"/>
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           <dia:attribute name="pos">
-            <dia:point val="29,12.9797"/>
+            <dia:point val="29,13.0269"/>
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           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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@@ -154,7 +132,7 @@ development#</dia:string>
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       <dia:attribute name="obj_bb">
-        <dia:rectangle val="25.8487,18.4059;32.1512,19.9509"/>
+        <dia:rectangle val="26.1125,18.3158;31.8875,19.9875"/>
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       <dia:attribute name="text">
         <dia:composite type="text">
@@ -172,7 +150,7 @@ Online: 7 * 4 hours#</dia:string>
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           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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           <dia:attribute name="alignment">
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@@ -203,10 +181,10 @@ Online: 7 * 4 hours#</dia:string>
         <dia:real val="0.10000000149011612"/>
       </dia:attribute>
       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
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       <dia:attribute name="inner_color">
-        <dia:color val="#c7c6f5ff"/>
+        <dia:color val="#c7c6f5"/>
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@@ -217,7 +195,7 @@ Online: 7 * 4 hours#</dia:string>
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       <dia:attribute name="obj_bb">
-        <dia:rectangle val="39.2762,11.9318;46.7237,16.0682"/>
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@@ -233,10 +211,10 @@ development#</dia:string>
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+            <dia:color val="#000000"/>
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@@ -252,7 +230,7 @@ development#</dia:string>
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-        <dia:rectangle val="39.9888,18.4059;46.0113,19.9509"/>
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@@ -270,7 +248,7 @@ Online: 7 * 4 hours#</dia:string>
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           </dia:attribute>
           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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@@ -301,10 +279,10 @@ Online: 7 * 4 hours#</dia:string>
         <dia:real val="0.10000000149011612"/>
       </dia:attribute>
       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
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       <dia:attribute name="inner_color">
-        <dia:color val="#c7c6f5ff"/>
+        <dia:color val="#c7c6f5"/>
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@@ -315,7 +293,7 @@ Online: 7 * 4 hours#</dia:string>
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       <dia:attribute name="obj_bb">
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@@ -331,10 +309,10 @@ development#</dia:string>
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+            <dia:point val="57,13.0269"/>
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+            <dia:color val="#000000"/>
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@@ -350,7 +328,7 @@ development#</dia:string>
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       <dia:attribute name="obj_bb">
-        <dia:rectangle val="53.9888,18.4059;60.0113,19.9509"/>
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       <dia:attribute name="text">
         <dia:composite type="text">
@@ -368,7 +346,7 @@ Online: 4 * 4 hours#</dia:string>
             <dia:point val="57,19"/>
           </dia:attribute>
           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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           <dia:attribute name="alignment">
             <dia:enum val="1"/>
@@ -399,10 +377,10 @@ Online: 4 * 4 hours#</dia:string>
         <dia:real val="0.10000000149011612"/>
       </dia:attribute>
       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
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       <dia:attribute name="inner_color">
-        <dia:color val="#c7c6f5ff"/>
+        <dia:color val="#c7c6f5"/>
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       <dia:attribute name="show_background">
         <dia:boolean val="true"/>
@@ -413,7 +391,7 @@ Online: 4 * 4 hours#</dia:string>
         <dia:point val="71,14"/>
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       <dia:attribute name="obj_bb">
-        <dia:rectangle val="67.2763,11.9318;74.7238,16.0682"/>
+        <dia:rectangle val="67.5062,11.8201;74.4937,16.1799"/>
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       <dia:attribute name="text">
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@@ -429,10 +407,10 @@ development#</dia:string>
             <dia:real val="1.411111056804657"/>
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           <dia:attribute name="pos">
-            <dia:point val="71,12.9797"/>
+            <dia:point val="71,13.0269"/>
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-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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             <dia:enum val="1"/>
@@ -448,7 +426,7 @@ development#</dia:string>
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       <dia:attribute name="obj_bb">
-        <dia:rectangle val="67.9887,18.4059;74.0112,19.9509"/>
+        <dia:rectangle val="68.1725,18.3158;73.8275,19.9875"/>
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       <dia:attribute name="text">
         <dia:composite type="text">
@@ -466,7 +444,7 @@ Online: 5 * 4 hours#</dia:string>
             <dia:point val="71,19"/>
           </dia:attribute>
           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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           <dia:attribute name="alignment">
             <dia:enum val="1"/>
@@ -497,10 +475,10 @@ Online: 5 * 4 hours#</dia:string>
         <dia:real val="0.10000000149011612"/>
       </dia:attribute>
       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
       </dia:attribute>
       <dia:attribute name="inner_color">
-        <dia:color val="#c7c6f5ff"/>
+        <dia:color val="#c7c6f5"/>
       </dia:attribute>
       <dia:attribute name="show_background">
         <dia:boolean val="true"/>
@@ -511,7 +489,7 @@ Online: 5 * 4 hours#</dia:string>
         <dia:point val="29,26"/>
       </dia:attribute>
       <dia:attribute name="obj_bb">
-        <dia:rectangle val="24.84,23.9318;33.16,28.0682"/>
+        <dia:rectangle val="25.0113,23.8201;32.9888,28.1799"/>
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       <dia:attribute name="text">
         <dia:composite type="text">
@@ -527,10 +505,10 @@ graphics stack#</dia:string>
             <dia:real val="1.411111056804657"/>
           </dia:attribute>
           <dia:attribute name="pos">
-            <dia:point val="29,24.9797"/>
+            <dia:point val="29,25.0269"/>
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           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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           <dia:attribute name="alignment">
             <dia:enum val="1"/>
@@ -546,7 +524,7 @@ graphics stack#</dia:string>
         <dia:point val="29,31"/>
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       <dia:attribute name="obj_bb">
-        <dia:rectangle val="25.9887,30.4059;32.0112,31.9509"/>
+        <dia:rectangle val="26.1725,30.3158;31.8275,31.9875"/>
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       <dia:attribute name="text">
         <dia:composite type="text">
@@ -564,7 +542,7 @@ Online: 4 * 4 hours#</dia:string>
             <dia:point val="29,31"/>
           </dia:attribute>
           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
           </dia:attribute>
           <dia:attribute name="alignment">
             <dia:enum val="1"/>
@@ -576,104 +554,6 @@ Online: 4 * 4 hours#</dia:string>
       </dia:attribute>
     </dia:object>
     <dia:object type="Standard - Box" version="0" id="O15">
-      <dia:attribute name="obj_pos">
-        <dia:point val="37,23"/>
-      </dia:attribute>
-      <dia:attribute name="obj_bb">
-        <dia:rectangle val="36.95,22.95;49.05,33.05"/>
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-      <dia:attribute name="elem_height">
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-      <dia:attribute name="border_width">
-        <dia:real val="0.10000000149011612"/>
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-      <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
-      </dia:attribute>
-      <dia:attribute name="inner_color">
-        <dia:color val="#c7c6f5ff"/>
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-      <dia:attribute name="show_background">
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-    <dia:object type="Standard - Text" version="1" id="O16">
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#Embedded Linux
-boot time
-optimization#</dia:string>
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-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
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-      <dia:attribute name="valign">
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-    <dia:object type="Standard - Text" version="1" id="O17">
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-      <dia:attribute name="text">
-        <dia:composite type="text">
-          <dia:attribute name="string">
-            <dia:string>#On-site: 3 days
-Online: 4 * 4 hours#</dia:string>
-          </dia:attribute>
-          <dia:attribute name="font">
-            <dia:font family="sans" style="0" name="Helvetica"/>
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@@ -693,21 +573,21 @@ Online: 4 * 4 hours#</dia:string>
         <dia:real val="0.10000000149011612"/>
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       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
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-        <dia:color val="#c7c6f5ff"/>
+        <dia:color val="#c7c6f5"/>
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       <dia:attribute name="show_background">
         <dia:boolean val="true"/>
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     </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O19">
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@@ -723,10 +603,10 @@ PREEMPT_RT#</dia:string>
             <dia:real val="1.411111056804657"/>
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           <dia:attribute name="pos">
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+            <dia:color val="#000000"/>
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@@ -737,12 +617,12 @@ PREEMPT_RT#</dia:string>
         <dia:enum val="2"/>
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     </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O20">
+    <dia:object type="Standard - Text" version="1" id="O17">
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@@ -760,7 +640,7 @@ Online: 3 * 4 hours#</dia:string>
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           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
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@@ -771,7 +651,7 @@ Online: 3 * 4 hours#</dia:string>
         <dia:enum val="3"/>
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-    <dia:object type="Standard - Box" version="0" id="O21">
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@@ -791,21 +671,21 @@ Online: 3 * 4 hours#</dia:string>
         <dia:real val="0.10000000149011612"/>
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       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
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+        <dia:color val="#c7c6f5"/>
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         <dia:boolean val="true"/>
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-    <dia:object type="Standard - Text" version="1" id="O22">
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             <dia:real val="1.411111056804657"/>
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+            <dia:point val="71,24.9713"/>
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@@ -836,12 +716,12 @@ analysis#</dia:string>
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@@ -859,7 +739,7 @@ Online: 4 * 4 hours#</dia:string>
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+            <dia:color val="#000000"/>
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@@ -870,15 +750,15 @@ Online: 4 * 4 hours#</dia:string>
         <dia:enum val="3"/>
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-    <dia:object type="Standard - Box" version="0" id="O24">
+    <dia:object type="Standard - Box" version="0" id="O21">
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+        <dia:point val="37,23"/>
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+        <dia:rectangle val="36.95,22.95;49.05,33.05"/>
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+        <dia:point val="37,23"/>
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@@ -890,21 +770,21 @@ Online: 4 * 4 hours#</dia:string>
         <dia:real val="0.10000000149011612"/>
       </dia:attribute>
       <dia:attribute name="border_color">
-        <dia:color val="#9999cbff"/>
+        <dia:color val="#9999cb"/>
       </dia:attribute>
       <dia:attribute name="inner_color">
-        <dia:color val="#c7c6f5ff"/>
+        <dia:color val="#c7c6f5"/>
       </dia:attribute>
       <dia:attribute name="show_background">
         <dia:boolean val="true"/>
       </dia:attribute>
     </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O25">
+    <dia:object type="Standard - Text" version="1" id="O22">
       <dia:attribute name="obj_pos">
-        <dia:point val="29,37"/>
+        <dia:point val="43,26"/>
       </dia:attribute>
       <dia:attribute name="obj_bb">
-        <dia:rectangle val="24.2638,35.6374;33.7362,38.3626"/>
+        <dia:rectangle val="38.5463,24.5257;47.4537,27.4743"/>
       </dia:attribute>
       <dia:attribute name="text">
         <dia:composite type="text">
@@ -919,10 +799,10 @@ audio#</dia:string>
             <dia:real val="1.411111056804657"/>
           </dia:attribute>
           <dia:attribute name="pos">
-            <dia:point val="29,36.6853"/>
+            <dia:point val="43,25.7325"/>
           </dia:attribute>
           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
           </dia:attribute>
           <dia:attribute name="alignment">
             <dia:enum val="1"/>
@@ -933,12 +813,12 @@ audio#</dia:string>
         <dia:enum val="2"/>
       </dia:attribute>
     </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O26">
+    <dia:object type="Standard - Text" version="1" id="O23">
       <dia:attribute name="obj_pos">
-        <dia:point val="29,42"/>
+        <dia:point val="43,31"/>
       </dia:attribute>
       <dia:attribute name="obj_bb">
-        <dia:rectangle val="25.9887,41.4059;32.0112,42.9509"/>
+        <dia:rectangle val="40.1725,30.3158;45.8275,31.9875"/>
       </dia:attribute>
       <dia:attribute name="text">
         <dia:composite type="text">
@@ -953,10 +833,10 @@ Online: 4 * 4 hours#</dia:string>
             <dia:real val="0.80000000000000004"/>
           </dia:attribute>
           <dia:attribute name="pos">
-            <dia:point val="29,42"/>
+            <dia:point val="43,31"/>
           </dia:attribute>
           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
           </dia:attribute>
           <dia:attribute name="alignment">
             <dia:enum val="1"/>
@@ -967,12 +847,12 @@ Online: 4 * 4 hours#</dia:string>
         <dia:enum val="3"/>
       </dia:attribute>
     </dia:object>
-    <dia:object type="Standard - Text" version="1" id="O27">
+    <dia:object type="Standard - Text" version="1" id="O24">
       <dia:attribute name="obj_pos">
-        <dia:point val="56.9662,38.7732"/>
+        <dia:point val="50,37"/>
       </dia:attribute>
       <dia:attribute name="obj_bb">
-        <dia:rectangle val="42.6287,36.705;71.3037,40.8413"/>
+        <dia:rectangle val="36.7175,34.8201;63.2825,39.1799"/>
       </dia:attribute>
       <dia:attribute name="text">
         <dia:composite type="text">
@@ -988,10 +868,10 @@ See https://bootlin.com/training/#</dia:string>
             <dia:real val="1.411111056804657"/>
           </dia:attribute>
           <dia:attribute name="pos">
-            <dia:point val="56.9662,37.7529"/>
+            <dia:point val="50,36.0269"/>
           </dia:attribute>
           <dia:attribute name="color">
-            <dia:color val="#000000ff"/>
+            <dia:color val="#000000"/>
           </dia:attribute>
           <dia:attribute name="alignment">
             <dia:enum val="1"/>