diff --git a/README.md b/README.md
index bcc8ebc..0d2a4aa 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 
 A [Hugo](https://gohugo.io/) site with the [tannevaled/hextra](https://github.com/tannevaled/hextra)
 fork of the [Hextra](https://github.com/imfing/hextra) theme, pinned at its
-**v0.16.0** tag, built the same way as the
+**v0.20.0** tag, built the same way as the
 [go-plot documentation](https://github.com/go-plot/docs), with go-slides'
 branding. It documents [`go-slides/slides`](https://github.com/go-slides/slides).
 
@@ -39,7 +39,7 @@ against that release (flags from its `slides -h`).
 | `layouts/_partials/custom/content-begin.html` | the outdated-version banner |
 | `layouts/_partials/favicons.html` | the brand's favicons |
 | `assets/css/custom.css` | the brand indigo as Hextra's primary colour, with its contrast measured |
-| `themes/hextra` | submodule: tannevaled/hextra at tag v0.16.0 |
+| `themes/hextra` | submodule: tannevaled/hextra at tag v0.20.0 |
 | `branding` | submodule: [go-slides/brand](https://github.com/go-slides/brand) |
 | `content/<lang>/` | the translations (fr, de, es, zh, ko, ja), with the English file names; Chinese is Simplified (`zh-Hans`). Code, flags, directive names and file names stay as in English; each translated heading carries the English heading's `{#anchor}` |
 | `tools/i18n` | a Go program (stdlib only, with tests): the CI fails when a page of `content/en` is missing in a language of `hugo.yaml` (or exists only in a translation), and warns when a translation changes code, shortcodes, link targets or anchors (`-strict` fails on those too); `-fix` adds the anchors, `-built public` compares the built site's heading ids with the English ones |
diff --git a/hugo.yaml b/hugo.yaml
index f4c4eb6..f803b64 100644
--- a/hugo.yaml
+++ b/hugo.yaml
@@ -133,6 +133,7 @@ menu:
       params:
         type: language-switch
         label: true
+        combo: true
         icon: translate
     - name: Theme
       weight: 5
@@ -168,6 +169,9 @@ params:
   # It appears once a second language is declared (languages: above).
   languageSwitch:
     icon: translate
+    # Once, in the navbar beside the theme toggle: not also at the foot of the
+    # sidebar. On a phone the navbar's combo keeps its icon and chevron.
+    location: navbar
   versions:
     # The version selector shows "main" with the development icon.
     development: "main"
diff --git a/themes/hextra b/themes/hextra
index 1d8daa4..b10e14f 160000
--- a/themes/hextra
+++ b/themes/hextra
@@ -1 +1 @@
-Subproject commit 1d8daa42d0406250fa00b7e803db2ab104a7fcab
+Subproject commit b10e14fa718d567a80e0a735f7176658a5a6f5c8