diff --git a/packages/sanity/src/core/form/inputs/PortableText/PortableTextInput.tsx b/packages/sanity/src/core/form/inputs/PortableText/PortableTextInput.tsx
index ceaa7af068b..f43d1b79a5a 100644
--- a/packages/sanity/src/core/form/inputs/PortableText/PortableTextInput.tsx
+++ b/packages/sanity/src/core/form/inputs/PortableText/PortableTextInput.tsx
@@ -65,8 +65,9 @@ export function PortableTextInput(props: PortableTextInputProps) {
     hotkeys,
     markers = EMPTY_ARRAY,
     onChange,
-    onEditorChange,
     onCopy,
+    onEditorChange,
+    onFullScreenChange,
     onInsert,
     onItemRemove,
     onPaste,
@@ -122,9 +123,11 @@ export function PortableTextInput(props: PortableTextInputProps) {
       } else {
         telemetry.log(PortableTextInputCollapsed)
       }
+
+      onFullScreenChange?.(next)
       return next
     })
-  }, [telemetry])
+  }, [onFullScreenChange, telemetry])
 
   // Reset invalidValue if new value is coming in from props
   useEffect(() => {
diff --git a/packages/sanity/src/core/form/types/inputProps.ts b/packages/sanity/src/core/form/types/inputProps.ts
index d6e17c1a42e..da1b1909561 100644
--- a/packages/sanity/src/core/form/types/inputProps.ts
+++ b/packages/sanity/src/core/form/types/inputProps.ts
@@ -512,6 +512,12 @@ export interface PortableTextInputProps
    * Returns changes from the underlying editor
    */
   onEditorChange?: (change: EditorChange, editor: PortableTextEditor) => void
+  /**
+   * Optional callback for when the editor goes into or out of full screen mode
+   * @hidden
+   * @beta
+   */
+  onFullScreenChange?: (isFullScreen: boolean) => void
   /**
    * Custom copy function
    */