When publishing live streams from Dolby.io dashboard users can configure the bandwidth and resolution from the settings option available in the publisher UI.
You can click on the COG icon on the bottom right of your publisher page, and select the Media Settings option. In the Media Settings menu option you can specify the desired bandwidth to get the desired quality of the stream.
The resolution can be specified under the same settings at the bottom section. You can also adjust other parameters based on the quality of the camera you are using. Please find the screenshot of the Media Settings for your reference.
You can find more details on How to Broadcast in Dashboard from here.