After you have defined what, where and when for the backup set, you can use the Backup How page to define some of the key internal parameters that control how the backup set will run after it has been activated. In most situations, the default values set for these parameters will work well for most backup sets and therefore need not be changed.
Advanced users intending to modify the default values should study the logs and reports of a few past backup runs in light of the discussion that follows.
The parameters should be specified for each backup set. Select the backup set using the table at the bottom of the page by clicking the table row.