I'm not sure what you mean by "Mode Settings." The following is from DHTML Menu Help:
There are 5 different sub-panels in Tasks Panel: Menu Item, Separator, Popup Menu, Global and Auto Scrolling.
Popup Menu panel is shown in Tasks panel when you choose an item having sub-items, which helps to edit the properties for the whole sub menu items.
Separator panel normally is not shown in Tasks Panel. Only when you add a separator in menu and select it in the Menu Tree or Preview Window to edit, Separator will show.
Different sub panels are displayed depending on what you have selected in the menu tree.
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