Samsung SP-M305 - Manual (Page 13)

2-3 Installation and Connection
2-3 Leveling with Adjustable Feet
The projector can be adjusted to a height of up to 1.18 inches (30mm, 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.