diff --git a/content/zettels/matlab.md b/content/zettels/matlab.md
index 5931647..eb5e5e9 100644
--- a/content/zettels/matlab.md
+++ b/content/zettels/matlab.md
@@ -16,11 +16,11 @@ Tags
 
 Books:
 
--   ([Higham 2017](#org11a6efd))
--   ([Attaway 2018](#org88197da))
--   ([OverFlow 2018](#org403ccdc))
--   ([Johnson 2010](#org2c4f5cd))
--   ([Hahn and Valentine 2016](#org45a0e18))
+-   ([Higham 2017](#org9e841d2))
+-   ([Attaway 2018](#org1d7c8f3))
+-   ([OverFlow 2018](#orgdf04055))
+-   ([Johnson 2010](#org329fa4a))
+-   ([Hahn and Valentine 2016](#org7d00587))
 
 
 ## Useful Commands {#useful-commands}
@@ -44,6 +44,12 @@ Books:
     Then the function is accessible with `folder.function`.
 
 
+## Figures {#figures}
+
+
+### Bode Plot {#bode-plot}
+
+
 ## Snippets {#snippets}
 
 
@@ -105,12 +111,12 @@ Nice functions:
 
 ## Bibliography {#bibliography}
 
-<a id="org88197da"></a>Attaway, Stormy. 2018. _MATLAB : a Practical Introduction to Programming and Problem Solving_. Amsterdam: Butterworth-Heinemann.
+<a id="org1d7c8f3"></a>Attaway, Stormy. 2018. _MATLAB : a Practical Introduction to Programming and Problem Solving_. Amsterdam: Butterworth-Heinemann.
 
-<a id="org45a0e18"></a>Hahn, Brian, and Daniel T Valentine. 2016. _Essential MATLAB for Engineers and Scientists_. Academic Press.
+<a id="org7d00587"></a>Hahn, Brian, and Daniel T Valentine. 2016. _Essential MATLAB for Engineers and Scientists_. Academic Press.
 
-<a id="org11a6efd"></a>Higham, Desmond. 2017. _MATLAB Guide_. Philadelphia: Society for Industrial and Applied Mathematics.
+<a id="org9e841d2"></a>Higham, Desmond. 2017. _MATLAB Guide_. Philadelphia: Society for Industrial and Applied Mathematics.
 
-<a id="org2c4f5cd"></a>Johnson, Richard K. 2010. _The Elements of MATLAB Style_. Cambridge University Press.
+<a id="org329fa4a"></a>Johnson, Richard K. 2010. _The Elements of MATLAB Style_. Cambridge University Press.
 
-<a id="org403ccdc"></a>OverFlow, Stack. 2018. _MATLAB Notes for Professionals_. GoalKicker.com.
+<a id="orgdf04055"></a>OverFlow, Stack. 2018. _MATLAB Notes for Professionals_. GoalKicker.com.
diff --git a/content/zettels/simulink.md b/content/zettels/simulink.md
index 9ab86c9..a7b6f81 100644
--- a/content/zettels/simulink.md
+++ b/content/zettels/simulink.md
@@ -32,6 +32,11 @@ Tips:
 -   It is possible to share configuration between files with **referenced configuration**
 
 
+## Control Simulink with the keyboard {#control-simulink-with-the-keyboard}
+
+<https://www.mathworks.com/help/simulink/ug/summary-of-mouse-and-keyboard-actions.html>
+
+
 ## Linearize portion of Simulink file {#linearize-portion-of-simulink-file}
 
 <https://in.mathworks.com/help/slcontrol/ug/specify-model-portion-to-linearize.html>