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The three buttons on the bottom right of the monitor are for input switching contrast/brightness and auto adjusting the screen so it fits your computer or dvd player screen length and width
Sorry, there was a problem. Please try again later.Blue filter, menu and select
Sorry, there was a problem. Please try again later.See page 15 of the user's guide for this monitor. It describes the purpose of each of the controls. Here is the link to the User's Guide: https://download.lenovo.com/consumer/options/lenovo_LI2264d_lcd_monitor_ug_en_v1.0_201511.pdf
Sorry, there was a problem. Please try again later.They are menu buttons for the on screen display. There are 4 menu buttons and 1 on off button. See page 1-4 in user guide available on Lenovo website.
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