# World Simulators

World Simulators are started and shut down with the World. They can be enabled and assigned in the *Worlds* section of the *Developer Portal*.

World simulation servers are started with the command line parameters described in the [Simulators](https://docs.coherence.io/1.7/manual/simulation-server/..#command-line-parameters-in-the-cloud) section.

![](https://content.gitbook.com/content/NGFZGdbLA4bzHQXTuDMT/blobs/jiqcBdPNI0K5Ajaxa1PB/image.png)