The Data File Editor is the editor in which to create, view, and edit data files of different organizations. This editor also provides comprehensive tools that enable you to filter on the records you require.
The Data File Editor is a multi-tabbed environment in which you can have one or more data files open at the same time, each in their own separate tab. Switching between tabs enables you to edit files simultaneously.
Each open file has a lock mode of EXCLUSIVE applied to it, and so will be locked from other users until the file is closed in the Data File Editor.