Freezing Destination Working Data

To freeze a working dataset that you have selected as a destination dataset as a reference dataset:

Mark a destination dataset.
In the Datasets menu, select Freeze destination working data.
The Freeze working data for destination working data dialog box opens.
Enter a name for the dataset.
Click OK.
The working dataset selected as destination dataset is saved as the new reference dataset. A new working dataset is created and used as the new destination dataset.