modify tabs description

Author: devalog

fern/products/docs/pages/navigation/images/tabs-header.png

@@ -240,7 +240,7 @@ Here's an example of what the Tabs implementation looks like:
   <img src="./images/tabs-sidebar.png" alt="Tabs displayed in the sidebar (default)" />
 </Frame>
 
-By default, tabs appear in the left sidebar. To display them horizontally, set `tabs-placement` to `header` in your layout configuration.
+Tabs display in the left sidebar by default. To display them horizontally, set `tabs-placement` to `header` in your [layout configuration](/docs/customization/what-is-docs-yml#layout-configuration).
 
 <CodeBlock title="docs.yml">
 ```yaml
@@ -249,12 +249,6 @@ layout:
 ```
 </CodeBlock>
 
-Here's an example of what the header placement looks like:
-
-<Frame> 
- <img src="./images/tabs-header.png" alt="Tabs displayed in the header" />
-</Frame>
-
 ## Versions
 
 If you have multiple versions of your documentation, you can introduce a dropdown version selector by specifying the `versions`. For more information, check out our [documentation on versioning](/learn/docs/building-your-docs/versioning).