diff --git a/doc/screenshots/picture_28.png b/doc/screenshots/picture_28.png
new file mode 100644
index 0000000..ac7b320
Binary files /dev/null and b/doc/screenshots/picture_28.png differ
diff --git a/doc/screenshots/picture_29.png b/doc/screenshots/picture_29.png
new file mode 100644
index 0000000..ad0ffe7
Binary files /dev/null and b/doc/screenshots/picture_29.png differ
diff --git a/doc/screenshots/picture_30.png b/doc/screenshots/picture_30.png
new file mode 100644
index 0000000..35d1d89
Binary files /dev/null and b/doc/screenshots/picture_30.png differ
diff --git a/doc/screenshots/picture_31.png b/doc/screenshots/picture_31.png
new file mode 100644
index 0000000..18bf8e0
Binary files /dev/null and b/doc/screenshots/picture_31.png differ
diff --git a/doc/screenshots/picture_32.png b/doc/screenshots/picture_32.png
new file mode 100644
index 0000000..b240f17
Binary files /dev/null and b/doc/screenshots/picture_32.png differ
diff --git a/doc/screenshots/picture_33.png b/doc/screenshots/picture_33.png
new file mode 100644
index 0000000..2e264ab
Binary files /dev/null and b/doc/screenshots/picture_33.png differ
diff --git a/doc/screenshots/picture_34.png b/doc/screenshots/picture_34.png
new file mode 100644
index 0000000..e927123
Binary files /dev/null and b/doc/screenshots/picture_34.png differ