Samsung SyncMaster 400MX-3 User Manuals page 125

Mode
You can change the Safety Screen Type.
• Bar
• Eraser
• Pixel
Period
Use this function to set the execution period for each mode set in the timer.
Time
Within the set period of time specify a time for execution.
Bar
This function prevents after-images on the screen by moving long black and white vertical lines.
Adjusting the LCD Display