... . Select on the OSD menu;2. Support up to 1920x1200 output;3. VGA Resolution: 640x480; 800x600; ... Down Function Key: A. MENU- Click it to enter into OSD menu;- Press it and hold on ... , contrast, saturation, hue adjustment, press it to increase the value;-Under the menu of resolution setting ... brightness, contrast, saturation, hue adjustment, click it to decrease the value;- Under the menu of resolution ...