diff --git a/doc/source/conf.py b/doc/source/conf.py
index 94f146ef5b0fadb9d1f875a6ef2ce25a3113c6ce..5837c45e5fe4500698e04d106780017d86570b19 100755
--- a/doc/source/conf.py
+++ b/doc/source/conf.py
@@ -78,7 +78,7 @@ language = None
 # List of patterns, relative to source directory, that match files and
 # directories to ignore when looking for source files.
 # This patterns also effect to html_static_path and html_extra_path
-exclude_patterns = []
+exclude_patterns = ['**/.ipynb_checkpoints/*']
 
 # The name of the Pygments (syntax highlighting) style to use.
 pygments_style = 'sphinx'
diff --git a/doc/source/tutorials/02c-orientation-2markers.ipynb b/doc/source/tutorials/02c-orientation-2markers.ipynb
index 54f8e020d823aadde592ca19c012e2352e30c8fc..9f7177ef167ec8a8a3acda0656837762fa5e2a9a 100644
--- a/doc/source/tutorials/02c-orientation-2markers.ipynb
+++ b/doc/source/tutorials/02c-orientation-2markers.ipynb
@@ -74,7 +74,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Angles from two markers\n",
+    "### Angles from two markers\n",
     "\n",
     "Here we illustrate, how the solution of the system in three cases: \n",
     "roll-aligned, pitch-aligned, and yaw-aligned, varies as a function of \n",
@@ -280,7 +280,7 @@
    "cell_type": "markdown",
    "metadata": {},
    "source": [
-    "## Solving pitch aligned markers with yaw, pitch, roll convention\n",
+    "### Solving pitch aligned markers with yaw, pitch, roll convention\n",
     "\n",
     "$v^{ref}=(0,-1,0)^T$\n",
     "\n",
@@ -290,7 +290,7 @@
     "   v_z^{bee} & = -\\cos\\beta \\sin\\gamma &\\quad \\text{from L3}\n",
     "   \\end{align}$$\n",
     "\n",
-    "### for $v_z^{bee}\\neq0 \\Rightarrow \\sin\\gamma\\neq0$\n",
+    "#### for $v_z^{bee}\\neq0 \\Rightarrow \\sin\\gamma\\neq0$\n",
     "\n",
     "$$\\begin{align}\n",
     "   \\cos\\gamma & = v_x^{bee}\\sin\\alpha -v_y^{bee}\\cos\\alpha  &\\quad \\text{from L1 and L2} \\\\\n",
@@ -299,7 +299,7 @@
     "\n",
     "From the two last equation $\\gamma$ and $\\beta$ can be found as a function of $\\alpha$ and $v^{bee}$\n",
     "\n",
-    "### for $v_z^{bee}=0$\n",
+    "#### for $v_z^{bee}=0$\n",
     "$$\\begin{align}\n",
     "   \\tan\\alpha & = -\\frac{v_x^{bee}}{v_y^{bee}} &\\quad \\text{from L1 and L2}\\\\\n",
     "   \\cos\\gamma & =\\pm\\sqrt{ \\left(v_x^{bee}\\right)^2 + \\left(v_y^{bee}\\right)^2 } &\\quad \\text{from L1 and L2}\\\\\n",
diff --git a/doc/source/tutorials/index.rst b/doc/source/tutorials/index.rst
index c3aafbff0d98764e874a96821a2b5637c69f6e65..5636c47c14f834d0e5556552d4f1a2ad341fdaa1 100644
--- a/doc/source/tutorials/index.rst
+++ b/doc/source/tutorials/index.rst
@@ -6,6 +6,9 @@ Tutorials
 
    01-building-arena.ipynb
    02-recording-animal-trajectory.ipynb
+   02a-orientation-background.ipynb
+   02b-orientation-3markers.ipynb
+   02c-orientation-2markers.ipynb
    03-rendering-along-trajectory.ipynb
    04-error-propagation.ipynb
    05-classification.ipynb