LG M4210D オーナーマニュアル

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This button is for the automatic adjustment of the screen position, clock and phase.
This function is suitable for analoge singnal input only.

To minimize any vertical bars or stripes visible on the screen background. The horizontal
screen size will also change. This function is suitable for analoge singnal input only.

To adjust the focus of the display. This item allows you to remove any horizontal noise
and clear or sharpen the image of characters. This function is suitable for analoge
singnal input only.

To select the image size of the screen. 
(1:1 menu are not supported over 1920 X 1080 resolution)

To adjust position of the screen.
This function is suitable for analog signal
input only.