Acer 31.5" ED320Q Xbmiipx 240 Hz Curved Gaming Monitor - Manual (Page 13)

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Follow these instructions to remove the base from the monitor.
Note: Carefully place the monitor face down on a flat surface-sue a
cloth pad to prevent scratching the screen.
1. Push up the split button to separate the base from the monitor.
2. Remove the screws that connect to the base.