Available operations

The buttons at the bottom of the Add to Combined Data Element window are:

Refreshes the information. If another user defines a combined data element from a different executable in the same database, you can see the changes.
Confirms the changes made to the combined data element. A newly created combined data element appears as the last field in the List of Data Elements grid.
Deletes all information for the selected combined data element.
Cancels any changes applied to the selected data element. Any actions confirmed with the Apply button cannot be restored with Cancel but must be entered and confirmed again.
Drag-and-drop operations
Data elements listed in the List of Data Elements grid can be added to the List of Data Elements grid by using a drag-and-drop operation.