Applying Energy Conservation Features
On supported Dell models, an Options tab is available that provides
PowerNap energy conservation options. You can choose to set the monitor's
brightness to the minimum level, or to put the monitor to sleep when the
screensaver is activated.
E1920H/E2020H/E2220H/E2420H/E2420HS/E2720H/E2720HS
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Applying Energy Conservation Features