You
can manually execute a backup set session with the Backup Now button.
If you have just one backup set, the backup will start immediately.
If you have more than one backup set, select the appropriate backup set
to run from your list of defined backup sets.
Please note that the default selection rests on the name of the last
backup set executed.
If you would like to automate your backups, use the Scheduler dialog in the Manage Backup Sets Wizard for hands-free automated backup runs.