diff --git a/doc/pic/chapter06_section06_pic1.png b/doc/pic/chapter06_section07_pic1.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic1.png
rename to doc/pic/chapter06_section07_pic1.png
diff --git a/doc/pic/chapter06_section06_pic10.png b/doc/pic/chapter06_section07_pic10.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic10.png
rename to doc/pic/chapter06_section07_pic10.png
diff --git a/doc/pic/chapter06_section06_pic2.png b/doc/pic/chapter06_section07_pic2.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic2.png
rename to doc/pic/chapter06_section07_pic2.png
diff --git a/doc/pic/chapter06_section06_pic3.png b/doc/pic/chapter06_section07_pic3.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic3.png
rename to doc/pic/chapter06_section07_pic3.png
diff --git a/doc/pic/chapter06_section06_pic4.png b/doc/pic/chapter06_section07_pic4.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic4.png
rename to doc/pic/chapter06_section07_pic4.png
diff --git a/doc/pic/chapter06_section06_pic5.png b/doc/pic/chapter06_section07_pic5.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic5.png
rename to doc/pic/chapter06_section07_pic5.png
diff --git a/doc/pic/chapter06_section06_pic6.png b/doc/pic/chapter06_section07_pic6.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic6.png
rename to doc/pic/chapter06_section07_pic6.png
diff --git a/doc/pic/chapter06_section06_pic7.png b/doc/pic/chapter06_section07_pic7.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic7.png
rename to doc/pic/chapter06_section07_pic7.png
diff --git a/doc/pic/chapter06_section06_pic8.png b/doc/pic/chapter06_section07_pic8.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic8.png
rename to doc/pic/chapter06_section07_pic8.png
diff --git a/doc/pic/chapter06_section06_pic9.png b/doc/pic/chapter06_section07_pic9.png
similarity index 100%
rename from doc/pic/chapter06_section06_pic9.png
rename to doc/pic/chapter06_section07_pic9.png
diff --git a/doc/pic/chapter06_section06_task.png b/doc/pic/chapter06_section07_task.png
similarity index 100%
rename from doc/pic/chapter06_section06_task.png
rename to doc/pic/chapter06_section07_task.png
diff --git a/products/+elltool/+doc/+snip/s_chapter06_section06_snippet01.m b/products/+elltool/+doc/+snip/s_chapter06_section07_snippet01.m
similarity index 100%
rename from products/+elltool/+doc/+snip/s_chapter06_section06_snippet01.m
rename to products/+elltool/+doc/+snip/s_chapter06_section07_snippet01.m