# Custom sidebar menu
Ubidots offers two ways for users to navigate an application:
* A fixed top navigation bar
* A customizable left navigation bar, also known as a "sidebar"
These options are available in the "App builder" section of your [apps](https://industrial.ubidots.com/app/apps/), as shown below:
### Top Navbar
This is how an application looks with a top navbar:
### Left Navbar
This is how an application looks with a left navbar:
In the latter case, you can collapse the bar to free up space on the rest of the page:
## Overview
When you select "Left navbar" as the navigation menu style, you can choose from two options:
* **Default**
* **Custom**, which enables the "Navigation menu" option
The "Default" option renders a fixed left sidebar with Ubidots' standard menu layout in the app. End users see options based on their [roles and permissions](https://help.ubidots.com/en/articles/2218051-user-management-roles).
### Custom
When you select the "Custom" option, you can customize the sidebar freely. In the example below, the menus, labels, icons, and dropdowns have been changed:
The sidebar also supports opening a secondary panel, called "asidepanel", from either a direct link or a menu item in the sidebar. This asidepanel can be static or load dynamic, user-aware content from an HTTP request.
You can do this through the "Edit menu" button, which opens an XML editor with a preview so you can see how the XML renders:
This is the XML that creates the custom sidebar seen above:
```xml
```
## Migration from v1 to v2
{% hint style="success" %}
**Contact support**
To migrate your XML v1 (deprecated in favor of v2) to v2, please contact us at .
{% endhint %}
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