Tabs (en.)
In Mongo Management Studio each collection is opened in a tab. By clicking on a collection in the left navigation tree, a new tab is opened or the existing tab is selected if it is already open for this collection. You can also explicitly open more tabs of one collection. To open an additional tab, right-click on the name of the collection in the left navigation tree and select "Open new tab" from the conext menu.
Each tab has a title consisting of the database and the collection name (e.g. blog.posts). In addition, a coloured bar is in the title of the tab. It has the same color as the server connection, to which the collection belongs. This way it is easy to tell the tabs apart when beeing connected to multiple MongoDB server instances.
Right-clicking on the title of a tab shows a shortcut menu with the functionality to either close all other tabs or all tabs.