Viewsonic P220F ユーザーズマニュアル

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ViewSonic
P220f        6
OSD Lock Settings
You have the option of using the On Screen Display (OSD) locking feature, 
OSD LOCK, to prevent unwanted changes to the current image settings.
• OSD Lock: Press and hold the [1] and [
]
 
buttons on the face of the monitor 
for 5 seconds. The message “OSD LOCK” will then display briefly,   
indicating that the OSD image settings are now locked.
• OSD Unlock: Press and hold the [1] and [
]
 
buttons again for 5 seconds. The 
message “OSD UNLOCK” will then display briefly,  indicating that the OSD 
image settings are now unlocked.