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ux-ui

Rule #7 – Give Users Control

By טוביה שיינפלד May 24, 2026 1 views

How do you let users control text size and contrast on a website?

An accessible interface lets users adjust text size, contrast, and colors to suit their personal needs. Test your site at a minimum zoom level of 200% (around 28px) to ensure content stays clear without layout breakage. Using relative units (rem/em) and supporting browser zoom guarantees a natural response to device or display changes.

Did you know:

Not all users see the same thing — give them control over text size, color, and contrast to improve readability and deliver a truly accessible user experience.

Different users prefer an interface tailored to their own comfort.
Especially when it comes to text, colors, and imagesthe ability to customize the display is an inseparable part of an accessible and enjoyable user experience.

Text Size – A Critical Parameter for Readability

People with partial or low vision often need larger, clearer text.
That's why it's recommended to test your site at a zoom level of at least 200% (approximately 28 pixels), and verify that content remains clear, accessible, and easy to navigate – without layout breakage, unnecessary scrolling, or clipped text.

Additional Customizations Worth Enabling:

  • Easy text resizing for example, through font-size control buttons or automatic adjustment to the user's browser settings.
  • Contrast and color adjustments such as switching to high-contrast mode, or adapting to light text on a dark background.
  • Scaling images, icons, and other elements in a way that supports zoom without distorting the page layout.
  • Using relative units (rem / em)which allow the interface to respond naturally to changes in device or browser settings.

A Personalized Experience – For Everyone

When you design an interface that allows personalization, you create a system that can accommodate a wide range of people, ages, and needs. This isn't just accessibility – it's a flexible, high-quality, and professional user experience.

Summary

Give users control – and you'll get an outstanding user experience.
Adapting text size, colors, and interface elements isn't an add-on – it's a fundamental part of building a comfortable, equitable, and enjoyable experience for all users.

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