diff --git a/docs/guide/app.md b/docs/guide/app.md
index 753648a88..8e924dc2b 100644
--- a/docs/guide/app.md
+++ b/docs/guide/app.md
@@ -129,7 +129,7 @@ Running this app will give you the following:
 
 Clicking either of those buttons will exit the app, and the `run()` method will return either `"yes"` or `"no"` depending on button clicked.
 
-#### Typing 
+#### Return type
 
 You may have noticed that we subclassed `App[str]` rather than the usual `App`.
 
@@ -137,7 +137,9 @@ You may have noticed that we subclassed `App[str]` rather than the usual `App`.
 --8<-- "docs/examples/app/question01.py"
 ```
 
-The addition of `[str]` tells Mypy that `run()` is expected to return a string. It may also return `None` if `sys.exit()` is called without a return value, so the return type of `run` will be `str | None`.
+The addition of `[str]` tells Mypy that `run()` is expected to return a string. It may also return `None` if [App.exit()][textual.app.App.exit] is called without a return value, so the return type of `run` will be `str | None`.
+
+You can change the type to match the values you intend to pass to App.exit()][textual.app.App.exit].
 
 !!! note
 
diff --git a/docs/styles/layout.md b/docs/styles/layout.md
index 65fdf7998..1ce87bf23 100644
--- a/docs/styles/layout.md
+++ b/docs/styles/layout.md
@@ -2,19 +2,22 @@
 
 The `layout` property defines how a widget arranges its children.
 
+See [layout](../guide/layout.md) guide for more information.
+
 ## Syntax
 
 ```
-layout: [vertical|horizontal|center];
+layout: [center|grid|horizontal|vertical];
 ```
 
 ### Values
 
 | Value                | Description                                                                   |
 |----------------------|-------------------------------------------------------------------------------|
-| `vertical` (default) | Child widgets will be arranged along the vertical axis, from top to bottom.   |
-| `horizontal`         | Child widgets will be arranged along the horizontal axis, from left to right. |
 | `center`             | A single child widget will be placed in the center.                           |
+| `grid`               | Child widgets will be arranged in a grid.                                     |
+| `horizontal`         | Child widgets will be arranged along the horizontal axis, from left to right. |
+| `vertical` (default) | Child widgets will be arranged along the vertical axis, from top to bottom.   |
 
 ## Example