We will commonly want some people to have a convenient block of links they are likely to need, and not show this to other people. We can do this in Drupal by giving people who should have common tasks or abilities in common a shared role, making a menu of the links we want to show, and placing the block with this menu into the region of our choice.

If we have a view using Row style: Fields for its Default display and Page display (for instance), and using the Style: Table with that, and we want to create a Page display with teasers instead, we find that the Row style setting is gone. We need to override the Style: Table first, and then Row style becomes visible and configurable again, and we can override it, and change it to Node. Now we can finally choose to show teasers.

The generic goal is a view of content useful to administrators or other privileged users. If it were possible for this goal to be met in a generic fashion, it is more than likely Drupal (or a module) would be providing it for us already, out of the box. Indeed, Drupal core does provide a very useful list of content available at the Content or Find content links (admin/content).