You can change the names of objects using a table.
Procedure
In the table, select the name of the object you want to rename. You can see which
object you are currently working on in the model graphic by the handles.
Enter the new name.
Exit the cell, for example, using the arrow key to move down or the Tab key to move to the right.
As soon as you have exited the cell, your changes are visible in the model.