Click on the right arrow next to the 'Filter' field to open the details pop-up menu. This menu allows you perform additional Outliner-related functions.
Use the Expand All menu item to expand (open all branches) the entire hierarchical view in the Outliner.
Use the Collapse All menu item to collapse (close all branches) the entire hierarchical view in the Outliner.
Sort by Name
Use the Sort by name menu item to toggle the sorting of the groups and components alphabetically.