Editing the Name of an Object
Go Up to Common Tasks
On the Data Model Explorer or Data Model window, double-click the object that you want to edit, and then change the name of the object in the editor.
Note: Alternatively, shift-click the object that you want to change and the object name becomes an editable field. Click Backspace to erase the name, enter a new name, and then click anywhere outside the object to submit the change.