diff --git a/doc/img/df-qg-01.png b/doc/img/df-qg-01.png
new file mode 100644
index 000000000..4c3612017
Binary files /dev/null and b/doc/img/df-qg-01.png differ
diff --git a/doc/img/df-qg-02.png b/doc/img/df-qg-02.png
new file mode 100644
index 000000000..8a70ef857
Binary files /dev/null and b/doc/img/df-qg-02.png differ
diff --git a/doc/img/df-qg-03.png b/doc/img/df-qg-03.png
new file mode 100644
index 000000000..c723b7528
Binary files /dev/null and b/doc/img/df-qg-03.png differ
diff --git a/doc/img/df-qg-04.png b/doc/img/df-qg-04.png
new file mode 100644
index 000000000..2b9f4c618
Binary files /dev/null and b/doc/img/df-qg-04.png differ
diff --git a/doc/img/df-qg-05.png b/doc/img/df-qg-05.png
new file mode 100644
index 000000000..79abe1e54
Binary files /dev/null and b/doc/img/df-qg-05.png differ
diff --git a/doc/img/df-qg-06.png b/doc/img/df-qg-06.png
new file mode 100644
index 000000000..bc3032986
Binary files /dev/null and b/doc/img/df-qg-06.png differ
diff --git a/doc/img/df-qg-07.png b/doc/img/df-qg-07.png
new file mode 100644
index 000000000..7f6566055
Binary files /dev/null and b/doc/img/df-qg-07.png differ
diff --git a/doc/img/df-qg-08.png b/doc/img/df-qg-08.png
new file mode 100644
index 000000000..5e463a3fa
Binary files /dev/null and b/doc/img/df-qg-08.png differ