You can open the Setting View window from the main window (button on the right) or any of the views supporting it (Tree, Table or Timeline). This view stays open until closed and displays the advanced settings for a view selected by the user. Follow one of the links to see what settings can be changed for one of the shown views:
Tree View's settings
Table View's settings
Timeline View's settings
When changing settings for the current view you can choose to apply the changes or to reset the changes by clicking on one of the buttons in the lower toolbar. Close the window through its system-menu or the close-button.