diff --git a/topics/04_mechanical/index.md b/topics/04_mechanical/index.md
index 40e71cd44adb9cc1ca8a80fe109aace8456740a6..827d5b63bbb1f367cc4aa535622156baeb98be29 100644
--- a/topics/04_mechanical/index.md
+++ b/topics/04_mechanical/index.md
@@ -36,7 +36,7 @@ Non-contact Mode: Oscillates above the adsorbed fluid layer on the surface durin
 <p><a href="https://www.sciencedirect.com/science/article/pii/S0304399118301797">Tip wear and tip breakage in high-speed atomic force microscopes</a></p>
 
 
-# Digitizer Pens
+# Touch Probes
 
 <a href="https://www.marposs.com/eng/application/technologies-touch-probes#:~:text=The%20working%20principle%20is%20quite,called%20the%20probe%20pre%2Dtravel.">Touch Probes</a>
 
@@ -59,14 +59,11 @@ DIY Projects
 <p><a href="https://www.instructables.com/CNC-Manual-Touch-Probe/">Touch Probe</a></p>
 <p><a href="http://www.homemetalshopclub.org/news/12/presentation_1202.pdf">Building a Digitizing Probe</a></p>
 
+### Digitizer Arms
 
+Passive Robot Arm
 
-
-# Digitizer Arms
-
-Passive Robot arm
-
-# Digital Templating
+### Digital Templating
 
 # Survey Prisms