added content_css_cors documentation

_data/nav.yml

@@ -96,6 +96,7 @@
     - url: "#body_class"
     - url: "#body_id"
     - url: "#content_css"
+    - url: "#content_css_cors"
     - url: "#content_style"
     - url: "#inline_boundaries"
     - url: "#inline_boundaries_selector"

_includes/configuration/content-css-cors.md

@@ -0,0 +1,19 @@
+
+## content_css_cors
+When setting the `content_css_cors` setting to `true` the editor will add a `crossorigin="anonymous"` attribute to the link tags that the StyleSheetLoader uses when loading the `content_css`, allowing you to host the `content_css` on a different server than the editor itself.
+
+**Type:** `Boolean`
+
+**Default Value:** `false`
+
+##### Example
+
+```js
+// File: http://domain.mine/mysite/index.html
+
+tinyMCE.init({
+  selector: 'textarea',  // change this value according to your HTML
+  content_css : 'http://www.somewhere.example/mycontent.css',
+  content_css_cors: true
+});
+```

configure/content-appearance.md

@@ -11,6 +11,8 @@ description: Configure the appearance of content inside TinyMCe's editable area.
 
 {% include configuration/content-css.md %}
 
+{% include configuration/content-css-cors.md %}
+
 {% include configuration/content-style.md %}
 
 {% include configuration/inline-boundaries.md %}