This manages index patterns, saved objects. The advanced settings can tweak some points, especially visualizations. 
Index Patterns sub-tab
Displays details of selected index patterns (screenshot shows logstash-*). 
Saved Objects sub-tab
Displays Edit Saved Objects. To modify, click name on list. 
Advanced Settings sub-tab
Settings can be directly edited here (admin privileges required). Carefully read the Caution statement, especially for the size of the history of saved search queries.
