Origin has a two column 1/4 - 3/4 layout with optional sidebar at right. When sidebar is engaged the content turns into 2/4 and the sidebar 1/4.
All items at Origin navigation list are displayed at all times, accordions and drop-downs are not used. Use the Sub-menu margin option to regulate a margin between the first (parent) and second (child) menu items. Note that third sub-menus are not supported.