Samsung HD Projector M221 Manuale Utente

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Installation and Connection
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Leveling with Adjustable Feet 
 
The projector can be adjusted to a height of up to 30 mm (about 12 °) from the reference point.
If <Auto Keystone> is set to <On>, <V-Keystone> is adjusted automatically.
If fine tuning is required after auto-adjustment, use <V-Keystone>. 
 
Press the PUSH buttons, as shown, to adjust the legs and level 
the projector.