# E2E Testing Across Every Screen Size

> Consistent Testing Across Every Screen Size Our customers told us testing applications across various

Source: https://qa.tech/changelog/e2e-testing-across-every-screen-size · Published: 2025-04-07

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### Consistent Testing Across Every Screen Size

Our customers told us testing applications across various device screens can be cumbersome—so we simplified it. Introducing **Device Presets**, a streamlined way to manage device-specific testing effortlessly.

**Why it matters:**

-   **Accurate Device Simulation:** Quickly test your app with common presets for desktop, tablet, and mobile—complete with resolution, user agent, locale, timezone, and custom headers.
-   **Simple Prioritization:** Device presets automatically follow a clear hierarchy—from test case revisions, through test cases and test plans, down to your project defaults.
-   **Centralized Management:** Create, customize, and manage your presets directly from your project settings. Keep consistency across your tests while maintaining flexibility.

**Preset Highlights:**

-   Easily select from popular resolutions like 1280×800 (desktop), 768×1024 (tablet), or 375×667 (mobile).
-   Customizable locale, timezone, and HTTP headers—no more juggling manual settings for different scenarios.
-   Built-in defaults and clear restrictions ensure optimal test execution speed and reliability.

Testing with different device viewports is now as simple as selecting your preset—ensuring your applications deliver a flawless experience on every screen, every time.