diff --git a/doc/img/df-tut-01.png b/doc/img/df-tut-01.png
new file mode 100644
index 000000000..f396c455d
Binary files /dev/null and b/doc/img/df-tut-01.png differ
diff --git a/doc/img/df-tut-02.png b/doc/img/df-tut-02.png
new file mode 100644
index 000000000..dac6ef340
Binary files /dev/null and b/doc/img/df-tut-02.png differ
diff --git a/doc/img/df-tut-03.png b/doc/img/df-tut-03.png
new file mode 100644
index 000000000..a7287dbf8
Binary files /dev/null and b/doc/img/df-tut-03.png differ
diff --git a/doc/img/df-tut-04.png b/doc/img/df-tut-04.png
new file mode 100644
index 000000000..91569e758
Binary files /dev/null and b/doc/img/df-tut-04.png differ
diff --git a/doc/img/df-tut-05.png b/doc/img/df-tut-05.png
new file mode 100644
index 000000000..23aeb3d4e
Binary files /dev/null and b/doc/img/df-tut-05.png differ
diff --git a/doc/img/df-tut-06.png b/doc/img/df-tut-06.png
new file mode 100644
index 000000000..a8ff109de
Binary files /dev/null and b/doc/img/df-tut-06.png differ