# Configure Rooms

![Configuring rooms in the Developer Portal](https://2821114902-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2Fv0ksjqOy2jWVMwsg4f9k%2Fuploads%2FBHJV2KIPKWrv23qokLUS%2Fimage.png?alt=media\&token=7a81467a-7637-41fc-ac9e-b06591de6982)

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/0.7.4/api-reference/network-sdk/rooms#rooms-api) to create rooms, the simulator uploaded through the SDK is automatically assigned in the creation request.