diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e17df5dc..afd5ec18 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -49,18 +49,18 @@ jobs:
       #     name: build-cache
       #     path: _build
       # Build Assets (Download Notebooks and PDF via LaTeX)
-      - name: Build Download Notebooks (sphinx-tojupyter)
-        shell: bash -l {0}
-        run: |
-          jb build lectures --path-output ./ --builder=custom --custom-builder=jupyter -n -W --keep-going
-          mkdir -p _build/html/_notebooks
-          cp -u _build/jupyter/*.ipynb _build/html/_notebooks
-      - name: Build PDF from LaTeX
-        shell: bash -l {0}
-        run: |
-          jb build lectures --builder pdflatex --path-output ./ -n -W --keep-going
-          mkdir _build/html/_pdf
-          cp -u _build/latex/*.pdf _build/html/_pdf
+      # - name: Build Download Notebooks (sphinx-tojupyter)
+      #   shell: bash -l {0}
+      #   run: |
+      #     jb build lectures --path-output ./ --builder=custom --custom-builder=jupyter -n -W --keep-going
+      #     mkdir -p _build/html/_notebooks
+      #     cp -u _build/jupyter/*.ipynb _build/html/_notebooks
+      # - name: Build PDF from LaTeX
+      #   shell: bash -l {0}
+      #   run: |
+      #     jb build lectures --builder pdflatex --path-output ./ -n -W --keep-going
+      #     mkdir _build/html/_pdf
+      #     cp -u _build/latex/*.pdf _build/html/_pdf
       # Final Build of HTML
       - name: Build HTML
         shell: bash -l {0}
diff --git a/environment.yml b/environment.yml
index 7424c22b..e643df97 100644
--- a/environment.yml
+++ b/environment.yml
@@ -20,4 +20,3 @@ dependencies:
     - array-to-latex
     - prettytable
 
-
diff --git a/lectures/_config.yml b/lectures/_config.yml
index 11484e2a..4f53f4f4 100644
--- a/lectures/_config.yml
+++ b/lectures/_config.yml
@@ -17,7 +17,7 @@ latex:
      targetname: quantecon-python-programming.tex
 
 sphinx:
-  extra_extensions: [sphinx_multitoc_numbering, sphinxext.rediraffe, sphinx_tojupyter, sphinx_exercise, sphinx_togglebutton]
+  extra_extensions: [sphinx_multitoc_numbering, sphinxext.rediraffe, sphinx_tojupyter, sphinx_exercise, sphinx_togglebutton, sphinx_design]
   config:
     html_favicon: _static/lectures-favicon.ico
     html_theme: quantecon_book_theme
diff --git a/lectures/jax_intro.md b/lectures/jax_intro.md
index 22dfb163..3c788618 100644
--- a/lectures/jax_intro.md
+++ b/lectures/jax_intro.md
@@ -11,7 +11,7 @@ kernelspec:
   name: python3
 ---
 
-# JAX
+# JAX {bdg-link-primary-line}`GPU <status:machine-details>`
 
 
 ```{note}