Edit semantic model in Power BI service

We are using Power BI Service with a premium (per user) license to publish dashboards to.  I wanted to be able to edit the semantic model on line.  I found the below article, but when I go to Power BI Service>Workspaces>Prod Workspace>Workspace Settings

I do not see Advanced as an option.  I went to about, and I don't see it under about either.  

Can somone tell me how we can edit the semantic model in Power BI service?

https://learn.microsoft.com/en-us/power-bi/transform-model/service-edit-data-models#enable-the-preview-feature 

Here is our Workspace settings options for this premium workspace.