Introducing Tabular Model Explorer for SQL Server Data Tools for Analysis Services Tabular Projects (SSDT Tabular)
If you download and install the August 2016 release of SQL Server Data Tools (SSDT) for Visual Studio 2015, you can find a new feature in SSAS Tabular projects, called Tabular Model Explorer, which lets you conveniently navigate through the various metadata objects in a model, such as data sources, tables, measures, and relationships. It is implemented as a separate tools window that you can display by opening the View menu in Visual Studio, pointing to Other Windows, and then clicking Tabular Model Explorer. The Tabular Model Explorer appears by default in the Solution Explorer area on a separate tab, as illustrated in the following screenshot.