Four winns V458 Owner's Manual page 108

The aft cabin window also opens to provide ventila-
tion. See Figure K3.
Figure K3: Aft Cabin Portlight Window
The cabin side windows (portlight) may be opened to
provide additional ventilation. See Figure K4.
Figure K4: Side (Portlight) Windows at Galley
Added cabin ventilation can be obtained using the
screen door at the companionway. See Figure K5.
Figure K5: Companionway Screen Door
Ventilation and Drainage Systems - Section K
The center windshield may be slid open to allow
ventilation of the cockpit as desired. See Figure K6.
Figure K6 Center Windshield
The hardtop features three (3) built-in skylights. The
port and starboard skylights may be open to also
assist in ventilating the cockpit area. The center is
fixed. See Figures K7 & K8.
Figure K7 Hardtop w/Skylights
Figure K8: Opening Skylight - Hardtop
Owner's Manual Page 106