diff --git a/.changeset/optional-input-block-docs.md b/.changeset/optional-input-block-docs.md
new file mode 100644
index 000000000..9a9c1811c
--- /dev/null
+++ b/.changeset/optional-input-block-docs.md
@@ -0,0 +1,5 @@
+---
+"@slack/bolt": patch
+---
+
+Clarify how to make input blocks optional in the Bolt documentation.
diff --git a/docs/english/concepts/creating-modals.md b/docs/english/concepts/creating-modals.md
index fa07b137b..6a1c7b6ed 100644
--- a/docs/english/concepts/creating-modals.md
+++ b/docs/english/concepts/creating-modals.md
@@ -70,4 +70,23 @@ app.command('/ticket', async ({ ack, body, client, logger }) => {
     logger.error(error);
   }
 });
-```
\ No newline at end of file
+```
+
+### Making input blocks optional
+
+Set `optional: true` on the enclosing `input` block when users should be able to submit the view without providing a value. This setting applies to elements inside the block, including select menus such as `multi_external_select`; the element itself does not need an `optional` field.
+
+```javascript
+{
+  type: 'input',
+  optional: true,
+  label: {
+    type: 'plain_text',
+    text: 'Choose projects'
+  },
+  element: {
+    type: 'multi_external_select',
+    action_id: 'projects'
+  }
+}
+```