Zenith DPDP60W Owner's Manual page 43

Press the menu button and then press the up/down button to
select SPECIAL menu.
Press the vol (1_) button,
@
_PF_AE
_ Press the vo! button to adjust OSD .......
ranspare ncy. _ .........
_ T_e adjustment range of _ANSPAR_CY ..... ;
is 0 _ 5,