Sony Alpha 230 - Manual (Page 117)

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In the default setting, while looking into the viewfinder, the LCD monitor
is turned off to prevent the battery pack from wearing down.
If you want to turn on the LCD monitor while looking into the viewfinder,
select [Off].
MENU button t 1 t [Auto off w/ VF] t [Off]
Keeping the LCD monitor tuned on while looking into the
viewfinder