Improve the documentation of the SaveButton when customizing the Toolbar

docs/CreateEdit.md

@@ -1226,7 +1226,7 @@ export const PostEdit = (props) => (
 );
 ```
 
-By default the `<SaveButton>` is disabled when the form is `pristine`. You can bypass this behavior and always enable it without recreating the whole `<Toolbar>`:
+In the default `<Toolbar>`, the `<SaveButton>` is disabled when the form is `pristine`. You can bypass this behavior and always enable it without customizing the `<Toolbar>` thanks to the prop `alwaysEnableSaveButton`:
 
 ```jsx
 import * as React from 'react';
@@ -1241,6 +1241,27 @@ export const PostEdit = (props) => (
 );
 ```
 
+But if you want to customize the `<Toolbar>` (to remove the `<DeleteButton>` for example), you have to manage the _disabled_ behaviour of the `<SaveButton>` by yourself:
+
+```jsx
+import * as React from "react";
+import { Edit, SimpleForm, SaveButton, Toolbar } from 'react-admin';
+
+const PostEditToolbar = props => (
+    <Toolbar {...props} >
+        <SaveButton disabled={!props.pristine} />
+    </Toolbar>
+);
+
+export const PostEdit = (props) => (
+    <Edit {...props}>
+        <SimpleForm toolbar={<PostEditToolbar />}>
+            // ...
+        </SimpleForm>
+    </Edit>
+);
+```
+
 Here are the props received by the `Toolbar` component when passed as the `toolbar` prop of the `SimpleForm` or `TabbedForm` components:
 
 * `handleSubmitWithRedirect`: The function to call in order to submit the form. It accepts a single parameter overriding the form's default redirect.