Samsung LB17KUBLK - Manual (Page 32)

Follow these instructions to change the vertical size of the
monitor's entire display.
Adjust the pincushion setting when the sides of the display
are bowed in or bowed out.
Adjust the pinbalance setting when the sides of the display
are bowed towards the left or right.
Adjust the trapezoid setting when the top or bottom of the
display is too large or small.
Adjust the parallelogram setting when the display is leaning
left or right.
You can see the frequency (user control mode) used by the user, the polarity of the operational
signals, the default frequency (default mode) set when you buy the monitor and the resolution
level.
Note: These screens do not allow any changes to the settings, they are for information only.