bca TRACKER4 Owner's Manual page 15

Operating Instructions
Big Picture mode is activated by holding down the Options button until
"BP" flashes in the display. You must continue to hold down the Options
button to stay in BP mode. Once the mode button is released, the
Tracker will automatically return to search mode and isolate the strongest
signal.
Note: When switching from SS to BP mode (and vice versa), it is necessary
to first go back to SE mode.
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