If you're just installing Matrix services for the first time, please continue with the [Configuration](configuring-playbook.md) / [Installation](installing.md) flow and come back here later.
**Note**: This playbook now supports running [Dimension](https://dimension.t2bot.io) in both a federated and [unfederated](https://github.com/turt2live/matrix-dimension/blob/master/docs/unfederated.md) environments. This is handled automatically based on the value of `matrix_synapse_federation_enabled`. Enabling Dimension, means that the `openid` API endpoints will be exposed on the Matrix Federation port (usually `8448`), even if [federation](configuring-playbook-federation.md) is disabled. It's something to be aware of, especially in terms of firewall whitelisting (make sure port `8448` is accessible).
[Dimension integrations manager](https://dimension.t2bot.io) installation is disabled by default. You can enable it in your configuration file (`inventory/host_vars/matrix.<your-domain>/vars.yml`):
The admin interface is accessible within Element by accessing it in any room and clicking the cog wheel/settings icon in the top right. Currently, Dimension can be opened in Element by the "Add widgets, bridges, & bots" link in the room information.
After Dimension has been installed you may need to log out and log back in for it to pick up the new integrations manager. Then you can access integrations in Element by opening a room, clicking the Room info button (`i`) button in the top right corner of the screen, and then clicking Add widgets, bridges & bots.
By default Dimension will use [jitsi.riot.im](https://jitsi.riot.im/) as the `conferenceDomain` of [Jitsi](https://jitsi.org/) audio/video conference widgets. For users running [a self-hosted Jitsi instance](./configuring-playbook-jitsi.md), you will likely want the widget to use your own Jitsi instance. Currently there is no way to configure this via the playbook, see [this issue](https://github.com/turt2live/matrix-dimension/issues/345) for details.
In the interim until the above limitation is resolved, an admin user needs to configure the domain via the admin ui once dimension is running. In Element, go to *Manage Integrations*→*Settings*→*Widgets*→*Jitsi Conference Settings* and set *Jitsi Domain* and *Jitsi Script URL* appropriately.
To learn more about how to do this, refer to the information about `matrix_dimension_configuration_extension_yaml` in the [default variables file](../roles/custom/matrix-dimension/defaults/main.yml) of the Dimension component.
You can find all configuration options on [GitHub page of Dimension project](https://github.com/turt2live/matrix-dimension/blob/master/config/default.yaml).