Instructions
Press the "MENU" button located on the back of the camera next to the LCD screen. This turns on the LCD display and shows the D40x's menu options.
Move the highlighted selection down using the round arrow pad until "CUSTOM SETTINGS" is highlighted, then press "OK." This opens the custom settings menu and allows you to change your camera's settings.
Scroll down using the arrow keys until "IMAGE REVIEW" is highlighted. The default setting for this option is "ON." Press the arrow key to highlight the "OFF" option, then press "OK." The LCD review is now disabled.