Last month we released a preview of the Azure Analysis Services web designer. This new browser-based experience will allow developers to start creating and managing Azure Analysis Services (AAS) semantic models quickly and easily. While SQL Server Data Tools (SSDT) and SQL Server Management Studio (SSMS) are still the primary tools for development, this new experience is intended to make modeling fast and easy. It is great for getting started on a new model or to do things such as adding a new measure to an existing model.
With this round of updates, we are adding the most significant modeling feature yet, the ability to edit your model visually with the new diagram editor.
Read more about it in the Azure blog.