![Tier 2 icon](https://developer.android.com/static/images/guide/topics/large-screens/quality-guidelines/tier-2/tier_2_icon.png)

TIER 2 --- Large screen optimized
| **Objective:** Make your app [large screen
| optimized](https://developer.android.com/docs/quality-guidelines/large-screen-app-quality#large_screen_optimized) by meeting the [LS-U1](https://developer.android.com/docs/quality-guidelines/large-screen-app-quality#LS-U1) through [LS-U4](https://developer.android.com/docs/quality-guidelines/large-screen-app-quality#LS-U4) user interface requirements of the [Large screen app
| quality](https://developer.android.com/docs/quality-guidelines/large-screen-app-quality) guidelines.

To users, the user interface is the app. The UI determines the user experience,
which determines user satisfaction, app usage, app purchases, customer
retention.

Large screens offer expansive display space for innovative, accommodative UIs
that provide a UX small screens can't replicate.

Optimize your app for large screens by including the following UI elements:

- Navigation rail or navigation drawer
- Large touch targets
- Well-placed menus and dialogs
- Multipane layouts

## Adaptive layouts

Create adaptive layouts that optimize your app's UI on screens large and small.
Design and build for multiple form factors simultaneously. Future-proof your app
for new device types.

## Canonical layouts

Take advantage of proven large screen layouts to make your app UX exceptional.
Create a list‑detail, supporting pane, or feed layout to make more content
more manageable and more enjoyable.

## Responsive UI

Format UI elements based on screen size. Constrain the width of buttons, cards,
and text fields that are full width on small screens to a functionally
appropriate size on large screens. Don't let dialog boxes and other modal
windows fill the entire screen. Position context menus and other
element‑related pop‑up displays adjacent to the element the user
selected, not centered on screen.

## Activity embedding

Update your activity‑based legacy apps with multipane layouts on large
screens. No code refactoring required. Configure your layouts in XML or with a
few Jetpack WindowManager API calls.

## Next steps

To learn about UI development for optimized UX, see the following developer
guides:

- [About adaptive layouts](https://developer.android.com/develop/ui/compose/layouts/adaptive)
- [Canonical layouts](https://developer.android.com/develop/ui/compose/layouts/adaptive/canonical-layouts)
- [Build responsive navigation](https://developer.android.com/develop/ui/views/layout/build-responsive-navigation)
- [Activity embedding](https://developer.android.com/develop/ui/views/layout/activity-embedding)