Vertical Extension; Rotating The Monitor - Dell UltraSharp U2422H User Manual

Vertical Extension

NOTE: The stand extends vertically up to 150 mm. The figure below
illustrates how to extend the stand vertically.

Rotating the Monitor

Before you rotate the monitor, your monitor should be fully vertically extended
(Vertical Extension) and fully tilted up to avoid hitting the bottom edge of the
monitor.
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50 Setting Up the Monitor