# Zooming and scaling must not be disabled

> Canonical HTML version: https://rocketvalidator.com/accessibility-validation/axe/4.6/meta-viewport
> Attribution: Rocket Validator (https://rocketvalidator.com)
> License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/)

The `user-scalable="no"` parameter in the `<meta name="viewport">` element must not be used since it prevents text scaling and zooming, which are necessary for individuals with impaired vision.

The option `user-scalable="no"` within the `content` attribute of the `<meta name="viewport">` element prevents page zooming.

The `maximum-scale` setting restricts the user's ability to zoom.
This is troublesome for individuals with low vision who rely on screen magnifiers to view web page content.

Users with partial or low vision frequently choose to increase their browser's fonts to make web content easier to read. Everything visible in the browser window at a given time is the viewport focus.
On a high-resolution display, maximizing the browser provides a big viewport focus area that may include the entire online page.

If the browser window is small, only a small portion of the web page will be seen in the viewport focus region. The viewport focus of the browser has no effect on the programmatic focus. Users can scroll the web page up and down, but the focus does not follow the viewport. Developers are required by the Web Content Accessibility Guidelines to create websites to accommodate resizing up to 200%.

Ensures that `user-scalable="no"` is not included in the `<meta name="viewport">` element and that `maximum-scale` is not less than 2.

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

Ensures that `user-scalable="no"` is not included in the `<meta name="viewport">` element and that `maximum-scale` is not less than 2.