diff --git a/assets/scss/custom.scss b/assets/scss/custom.scss
index 047e57d7..8867fc8e 100644
--- a/assets/scss/custom.scss
+++ b/assets/scss/custom.scss
@@ -512,3 +512,24 @@ dd {
     border-radius: 0.25rem;  // was $border-radius, but that var isn't accessible here.
   }
 }
+
+/* Styling for the summary-table shortcode */
+.summary-table {
+  tr {
+    // Unset the .table-striped styling that docsy applies by default.
+    background-color: unset !important;
+  }
+  .required {
+    background-color: rgba($black, 0.07);
+    position: absolute;
+    top: 0;
+    bottom: 0;
+    left: 0;
+    right: 0;
+    z-index: -1;
+  }
+  td {
+    position: relative;
+    padding: .3rem 0.75rem !important;
+  }
+}
diff --git a/config.toml b/config.toml
index c6f1bd45..49b62398 100644
--- a/config.toml
+++ b/config.toml
@@ -28,6 +28,8 @@ weight = 1
     [markup.goldmark.renderer]
       # Enables us to render raw HTML
       unsafe = true
+    [markup.goldmark.parser.attribute]
+      block = true  # used by the summary-table shortcode
   [markup.highlight]
       # See a complete list of available styles at https://xyproto.github.io/splash/docs/all.html
       # If the style is changed, remember to regenerate the CSS with:
diff --git a/content/client-server-api/_index.md b/content/client-server-api/_index.md
index 0e7e8473..72a94c4f 100644
--- a/content/client-server-api/_index.md
+++ b/content/client-server-api/_index.md
@@ -2565,6 +2565,7 @@ that profile.
 
 #### Summary
 
+{{<summary-table>}}
 | Module / Profile                                           | Web       | Mobile   | Desktop  | CLI      | Embedded |
 |------------------------------------------------------------|-----------|----------|----------|----------|----------|
 | [Instant Messaging](#instant-messaging)                    | Required  | Required | Required | Required | Optional |
@@ -2603,6 +2604,7 @@ that profile.
 | [Event Annotations and reactions](#event-annotations-and-reactions) | Optional  | Optional | Optional | Optional | Optional |
 | [Threading](#threading)                                    | Optional  | Optional | Optional | Optional | Optional |
 | [Reference Relations](#reference-relations)                | Optional  | Optional | Optional | Optional | Optional |
+{{</summary-table>}}
 
 *Please see each module for more details on what clients need to
 implement.*
diff --git a/layouts/shortcodes/summary-table.html b/layouts/shortcodes/summary-table.html
new file mode 100644
index 00000000..db56d4f1
--- /dev/null
+++ b/layouts/shortcodes/summary-table.html
@@ -0,0 +1,6 @@
+{{/*
+
+  This template is used to visually emphasize table cells containing the text "Required".
+
+*/}}
+{{ print (replace .Inner "Required" "<span class=required></span>Required") "{.summary-table}" | markdownify }}