Object explorer
Servers, their databases and the objects inside, grouped by type.
The left panel is the explorer. Each named connection is a server row (@uat, @prod) with the badge of its environment; under it are the databases the server listed, and under an opened database the schemas and the object folders with their counts. A database row is read once, cached, and refreshed on a schedule or when the server reports a change, so opening folders costs nothing. The main area holds the tabs: here a query tab connected to @uat/AppDb, whose source box, banner and status bar all say where it points. The toolbar's dimmed Browse, New query and Export act on whatever is typed in the source box at the top left, which accepts a connection string, an @alias, a folder of SQL files or a .dacpac.