A ventilator device (10) includes a display screen (50, 101) to display a plurality of ventilator functions/modes (or menus) and a plurality of parameters (or sub-menus) associated with at least one of said ventilator functions/modes. A control member, e.g., in the form of a multifunction finger-operable dial (55, 102) is provided to select from the plurality of ventilator functions/modes and/or parameters, the dial being manipulatable in a first manner (e.g., rotation) to scroll between said parameters, and being manipulatable in a second manner (e.g., touching, pressing and/or depressing) to select one of the ventilator functions/modes and/or parameters.