Dell P2723D 27" 1440p Monitor - Manual (Page 36)

36 │ Setting up the monitor
Removing the monitor stand
NOTE: To prevent scratches on the LCD screen when removing the
stand, ensure that the monitor is placed on a soft surface and handle it
carefully.
NOTE: The following steps are specifically for removing the stand that
is shipped with your monitor. If you are removing a stand that you
purchased from any other source, follow the setup instructions that
are included with the stand.
To remove the stand:
1. Place the monitor on a soft cloth or cushion.
2. Press and hold the stand release button.
3. Lift the stand up and away from the monitor.