. OPERATION DETAILED CONTROLS AND GAUGES Adjusting Screen screen adjustment menu to adjust the brightness, contrast, and back light of the screen. 3 - 52 Use this 1. On th e standar d screen, p res s switch F6. 2. Select screen a djustment on t he u ser menu, then press switch F6 . T he scree n switche for scree n adjustment. On machines equipped wit h cameras, it is possible to adjust t he brightne ss, and back light cameras screen on thi s menu.