You can create a new selection list by merging two or more existing lists with new selections. You can also replace selections in the tree with other selection lists.
To merge and replace selection lists
Under Selection Lists Tasks in the task pane, select New backup selection list.
On the New Backup Selection List dialog box, select resources to include in the selection list.
On the Use Selections dialog box, select the selection lists that you want to merge with or replace the previously selected backup selections.
Complete the other options on the New Backup Selection List dialog box.