Dell UltraSharp 25 Series User Manual page 54

When the monitor goes into power-save mode, the following message appears:
Activate the computer and wake up the monitor to gain access to the OSD.
NOTE: The message may be slightly different according to the
connected input signal.
The OSD functions only in the normal operation mode. If you press any button other
than the power button during the Active-off mode, the following message will
appear depending on the selected input:
Activate the computer and the monitor to gain access to the OSD.
NOTE: The message may be slightly different according to the
connected input signal.
When Smart HDR is activated and you try to change the preset mode, the
following message appears:
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54 Operating the monitor