Select this option to let the program determine automatically what layout strategies to use. Owing to the dynamic nature of a web page. It is most likely that the strategies determined are not appropriate. Deselect this option will show what options have been determined automatically without considering its relationship with the surrounding elements. You can then customize your settings.
Fit the navigation bar to the browser window width
Expand the width of this vertical navigation bar to the width of the browser window. This option works for horizontal navigation bar also if mobile menu is not selected.