# Configure Rooms

![Configuring rooms in the Developer Portal](https://3580906557-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FUrQ8GJkdHxImzMEWuxaz%2Fuploads%2Fgit-blob-29c9b98500000e6c2432d742ea3c75ee4db62a04%2FRooms.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/0.8/api-reference/network-sdk/rooms#rooms-api) to create rooms, the simulator uploaded through the SDK is automatically assigned in the creation request.