. OPERATION DETAILED CONTROLS AND GAUGES Adjusting Screen screen adjustment menu to adjust the brightness, contrast, and back light of the screen. 3 - 59 Use this 1. On th e standar d screen, p ress switch F6. 2. Select screen a djustment on the u ser menu, then press switch F6 . T he scree n switche the for scree n adjustment. On machines equipped with cameras, it is possible to adjust t he brightne ss, contrast, light cameras screen on thi s menu.