# CSS Media queries must not lock display orientation

> Canonical HTML version: https://rocketvalidator.com/accessibility-validation/axe/4.10/css-orientation-lock
> Attribution: Rocket Validator (https://rocketvalidator.com)
> License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

The screen orientation (such as portrait or landscape) of mobile applications should not be restricted to a single mode. Users should be able to shift the orientation of their device between portrait and landscape without losing readability. Additionally, upon opening a page, it should appear in the current orientation of the user.

Users of assistive technologies may not have access to orientation features on their devices or assistive technologies.

<h3>What this Accessibility Rule Checks</h3>

Unless a specific display orientation is important, content does not confine its view and functionality to a single display orientation, such as portrait or landscape.