Add pointer extension

index.qmd

@@ -23,6 +23,8 @@ format:
         crossrefs-hover: true
         pagetitle: "De-Fence"
         html-math-method: mathjax
+        pointer:
+            color: "#1B5E20"
         include-in-header:
           - file: custom.html
 execute:
@@ -30,6 +32,8 @@ execute:
 highlight-style: github
 bibliography: assets/library.bib
 csl: apa-old-doi-prefix.csl
+revealjs-plugins:
+  - pointer
 ---
 
 ## Outline