diff --git a/docs/_config.yml b/docs/_config.yml
index 48a4cfd..7021b1c 100644
--- a/docs/_config.yml
+++ b/docs/_config.yml
@@ -60,3 +60,41 @@ callouts:
 #   - vendor/cache/
 #   - vendor/gems/
 #   - vendor/ruby/
+
+# For copy button on code
+enable_copy_code_button: true
+
+# Waiting until it's needed.
+# # By default, consuming the theme as a gem leaves mermaid disabled; it is opt-in
+# mermaid:
+#   # Version of mermaid library
+#   # Pick an available version from https://cdn.jsdelivr.net/npm/mermaid/
+#   version: "9.1.6"
+
+# Aux links for the upper right navigation
+aux_links:
+  "twinBASIC Home":
+    - "https://www.twinbasic.com"
+
+# External navigation links
+nav_external_links:
+  - title: twinBASIC Home
+    url: https://www.twinbasic.com
+
+# Back to top link
+back_to_top: true
+back_to_top_text: "Back to top"
+
+footer_content: 'Copyright © 2025 TWINBASIC LTD (Company No. 16590181, VAT No. GB497509439)'
+
+# Footer last edited timestamp
+last_edit_timestamp: true # show or hide edit time - page must have `last_modified_date` defined in the frontmatter
+last_edit_time_format: "%b %e %Y at %I:%M %p" # uses ruby's time format: https://ruby-doc.org/stdlib-2.7.0/libdoc/time/rdoc/Time.html
+
+# Footer "Edit this page on GitHub" link text
+gh_edit_link: true # show or hide edit this page link
+gh_edit_link_text: "Edit this page on GitHub"
+gh_edit_repository: "https://github.com/twinbasic/documentation/" # the github URL for your repo
+gh_edit_branch: "main" # the branch that your docs is served from
+# gh_edit_source: docs # the source that your files originate from
+gh_edit_view_mode: "tree" # "tree" or "edit" if you want the user to jump into the editor immediately
\ No newline at end of file