diff --git a/README.md b/README.md
index f76e8ce41..30e259360 100644
--- a/README.md
+++ b/README.md
@@ -31,6 +31,16 @@ The community is writing guides, installation instructions, and everything you n
 - [Issue Tracker](https://github.com/plone/documentation/issues)
 - [Source Code](https://github.com/plone/documentation/tree/6-dev)
 
+### Contributing to frontend (Volto), `plone.api`, and `plone.restapi` documentation
+
+Plone documentation consists of this repository, `plone/documentation`, and it includes external packages' documentation through git submodules.
+Those packages include:
+
+- [`volto`](https://github.com/plone/volto)
+- [`plone.api`](https://github.com/plone/plone.api)
+- [`plone.restapi`(https://github.com/plone/plone.restapi)
+To contribute documentation, please open a pull request in the appropriate repository.
+For details, see [Editing external package documentation](https://6.dev-docs.plone.org/contributing/index.html#contributing-editing-external-package-documentation-label).
 
 ## Support
 
diff --git a/docs/conf.py b/docs/conf.py
index 332c0a086..38db28db1 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -62,7 +62,7 @@
 # to convert quotes and dashes to typographically correct entities.
 # Note to maintainers: setting this to `True` will cause contractions and
 # hyphenated words to be marked as misspelled by spellchecker.
-smartquotes=False
+smartquotes = False
 
 # The name of the Pygments (syntax highlighting) style to use.
 # pygments_style = "sphinx.pygments_styles.PyramidStyle"
@@ -136,12 +136,12 @@
 # https://myst-parser.readthedocs.io/en/latest/syntax/optional.html
 myst_enable_extensions = [
     "deflist",  # You will be able to utilise definition lists
-                # https://myst-parser.readthedocs.io/en/latest/syntax/optional.html#definition-lists
+    # https://myst-parser.readthedocs.io/en/latest/syntax/optional.html#definition-lists
     "linkify",  # Identify “bare” web URLs and add hyperlinks.
     "colon_fence",  # You can also use ::: delimiters to denote code fences,\
-                    #  instead of ```.
+    #  instead of ```.
     "substitution",  # plone.restapi \
-        # https://myst-parser.readthedocs.io/en/latest/syntax/optional.html#substitutions-with-jinja2
+    # https://myst-parser.readthedocs.io/en/latest/syntax/optional.html#substitutions-with-jinja2
 ]
 
 myst_substitutions = {
@@ -208,8 +208,7 @@
 html_logo = "_static/logo.svg"
 html_favicon = "_static/favicon.ico"
 
-html_css_files = ["custom.css",
-                  ("print.css", {"media": "print"})]
+html_css_files = ["custom.css", ("print.css", {"media": "print"})]
 
 # See http://sphinx-doc.org/ext/todo.html#confval-todo_include_todos
 todo_include_todos = True
@@ -258,10 +257,22 @@
 # Grouping the document tree into LaTeX files. List of tuples
 # (source start file, target name, title, author, documentclass [howto/manual])
 latex_documents = [
-    ("index", "PloneDocumentation.tex", "Plone Documentation",
-     "The Plone community", "manual"),
+    (
+        "index",
+        "PloneDocumentation.tex",
+        "Plone Documentation",
+        "The Plone community",
+        "manual",
+    ),
 ]
 
 # The name of an image file (relative to this directory) to place at the top of
 # the title page.
 latex_logo = "_static/logo_2x.png"
+
+
+# suggest edit link
+# remark: {{ file_name }} is mandatory in "edit_page_url_template"
+html_context = {
+    "edit_page_url_template": "https://6.dev-docs.plone.org/contributing/index.html?{{ file_name }}#making-contributions-on-github",
+}
diff --git a/docs/contributing/index.md b/docs/contributing/index.md
index 2726f19dc..4d313004e 100644
--- a/docs/contributing/index.md
+++ b/docs/contributing/index.md
@@ -84,7 +84,7 @@ Tap, click, or hover over the GitHub Octocat icon for options.
 :alt: GitHub navigation menu 
 ```
 
-You can use this menu to quickly navigate to the `documentation` source repository, open an issue, or suggest an edit to the current document.
+You can use this menu to quickly navigate to the `documentation` source repository or open an issue.
 Note that this navigation convenience is provided only for the `documentation` repository.