---
title: Route Segment Config
description: Learn about how to configure options for Next.js route segments.
---

The Route Segment Config options allow you to configure the behavior of a [Page](/docs/app/api-reference/file-conventions/page), [Layout](/docs/app/api-reference/file-conventions/layout), or [Route Handler](/docs/app/api-reference/file-conventions/route) by directly exporting the following variables:

| Option                                                                                             | Type                                                              | Default                    |
| -------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------- | -------------------------- |
| [`dynamicParams`](/docs/app/api-reference/file-conventions/route-segment-config/dynamicParams)     | `boolean`                                                         | `true`                     |
| [`runtime`](/docs/app/api-reference/file-conventions/route-segment-config/runtime)                 | `'nodejs' \| 'edge' (deprecated)`                                 | `'nodejs'`                 |
| [`preferredRegion`](/docs/app/api-reference/file-conventions/route-segment-config/preferredRegion) | `'auto' \| 'global' \| 'home' \| string \| string[] (deprecated)` | `'auto'`                   |
| [`maxDuration`](/docs/app/api-reference/file-conventions/route-segment-config/maxDuration)         | `number`                                                          | Set by deployment platform |

## Version History

| Version      |                                                                                                                                                                                                                                                                                                |
| ------------ | ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |
| `v16.0.0`    | `dynamic`, `dynamicParams`, `revalidate`, and `fetchCache` removed when [Cache Components](/docs/app/api-reference/config/next-config-js/cacheComponents) is enabled. See [Caching and Revalidating (Previous Model)](/docs/app/guides/caching-without-cache-components#route-segment-config). |
| `v16.0.0`    | `export const experimental_ppr = true` removed. A [codemod](/docs/app/guides/upgrading/codemods#remove-experimental_ppr-route-segment-config-from-app-router-pages-and-layouts) is available.                                                                                                  |
| `v15.0.0-RC` | `export const runtime = "experimental-edge"` deprecated. A [codemod](/docs/app/guides/upgrading/codemods#transform-app-router-route-segment-config-runtime-value-from-experimental-edge-to-edge) is available.                                                                                 |