# Configure Rooms

![Configuring rooms in the Developer Portal](https://3798176112-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FZcBSvjNQZSas5L9C0K8K%2Fuploads%2Fp3L1Vxwr1UgcjH5Yih97%2Fimage.png?alt=media)

From the left sidebar, select *Rooms*. On this page you can:

* choose the regions you want to allow your rooms to be created in
* enable Simulators for your Rooms
* view a list of recently created Rooms

### Simulators

From the Developer Portal, you can configure what size you want your Simulator instances to be. To attach a Simulator to a Room, send the "Simulator slug" uploaded through the SDK with the Rooms creation request. When using the [PlayResolver](https://docs.coherence.io/0.9/api-reference/network-sdk/rooms#rooms-api) to create Rooms, the Simulator uploaded through the SDK is automatically assigned in the creation request.