Specify the backup action (page 22 in the User's Guide): recycle (full), normal (incremental), or new media (full to new backup set). Do this when executing an immediate backup, by changing the backup options (page 139). Do this when running a script by selecting an item from the manual execution dialog's pop-up menu (page 64). Do this beforehand when scheduling a script (page 60). Finally, you can do this by configuring the backup set and using Retrospect's Media Action feature (page 148).