80 Chapter 4. Red Hat Network WebsiteIn addition, you may establish default system groups for the user to capture all systems registeredby that user. To do this, select the default group or groups from the dropdown menu at the bottomof the page. Then click the Update Defaults button. An asterisk appears next to the names of thedefaults in the dropdown menu.• Systems — List of systems that the user can administer. These systems come from the systemgroups assigned to the user on the previous tab. To add systems to the System Set Manager, selectthem and click the Update button. Clicking the name of a system takes you to its System Detailspage. Refer to Section 4.4.2.6 System Details for more information.• Channel Permissions — Subscription and management options set in these subtabs (which corre-spond with similar tabs on the Channel Details and Managed Channel Details pages):• Subscription — Identifies channels the user may subscribe systems to. To change these, select orunselect the appropriate checkboxes and click the Update Permissions button. Note that chan-nels subscribable through the user’s admin status or the channel’s global setting cannot be altered.They are identified with a check icon.• Management — Identifies channels the user may manage. To change these, select or unselect theappropriate checkboxes and click the Update Permissions button. This status does not enablethe user to create new channels. Note that channels automatically manageable through the user’sadmin status cannot be altered. They are identified with a check icon.• Preferences — Modifiable Red Hat Network options. These include:• Email Notification — Determine whether you want to receive email every time an Errata Alertis applicable to one or more systems in your RHN account, as well as daily summaries of systemevents.• RHN List Page Size — Maximum number of items that will appear in a list on a single page.If more items are in the list, clicking the Next button will display the next group of items. Thispreference applies to the user’s view of system lists, Errata lists, package lists, and so on.• Time Zone — Set your time zone so that scheduled actions are arranged according to the time inyour time zone.• Red Hat Contact Options — Identify what ways (email, phone, fax, or mail) Red Hat may contactyou.To modify any of these options, make your changes and click the Save Preferences button.• Addresses — General address, billing address, and shipping address for the user, as configuredduring user creation. To modify these addresses, click Edit this address below the address to bemodified, make the changes, and click the Update button.