Toshiba 52ZV650U Owner's Manual page 45

Switching between two channels
using SurfLock
TM
The SurfLock I_ feature temporarily "memorizes"
one channel to the _ button, so you can return to
that channel quickly from any other channel by
pressing _.To memorize a channel to the
button:
1
2
3
Tune the TV to the channel you want to program
into the _ button.
Press and hold _ for about 2 seconds until the
message_ "Memorized" a ppears on-screen. The
channel has been programmed to the _ button.
You can then change channels repeatedly, and
when you press _, the memorized channel will
be tuned.
The TV will return to the memorized channel one
time only. Once you press _ and then change
channels again, the CH RTN memory will be cleared
and the button will function as Channel Return, by
switching back and forth between the last two
channels that are tuned.This feature also works for
external inputs.
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