A target device with a crosshair plate has a target marking. An anchor is received that represents a point on a line of virtualized visible content and a target value is received that represents a location in a viewport of a user interface. The sunroof part is moved to the interference-preventing position during at least part of the movement of the top from the top closed position to the top open position and is moved to the intermediate position when in the top open position. The vent tube assembly relieves this condition and thereby significantly reduces parasitic power losses. An intended chromaticity can be obtained by varying how much in terms of area the green phosphor layer and the red phosphor layer overlap with each other and thereby adjusting the green light absorption amount of the red phosphor. This additive composition may be used to stabilize materials from UV radiation.