:menu MENUBARITEM.DROPDOWNITEM [keystrokes go here] – Appends/updates a drop-down menu, MENUBARITEM, with DROPDOWNITEM as the last menu selection. When this menu is selected, the keystrokes specified at the end are entered. :hi Search guibg=LightGreen – change background for search highlighting.

-o N – open N windows, or as many windows as file arguments passed (open windows as splits within the same session)