Sharp AN-52AG1 Mode D'emploi page 24

Height marks on the side of the based bracket
The wall-mount bracket allows the height of the LCD television to be
changed between the 3 settings of 0 cm (standard), +5 cm, and -5 cm.
The standard position (television screen center) is when the top-most
pin of the main bracket unit is in the second groove from the top of the
based bracket (shown by a yellow "0"). (See illustration below.)
(The alignment line that marks the wall mount bracket television screen
center is also in the 0 cm (standard) position.)
+5
(Green)
+5
0
(Yellow)
0
-5
-5
(Blue)
Wall side TV set side
E-6