Lifescan ONETOUCH PROFILE Owner's Booklet page 62

You can link an event label to your
blood glucose result immediately after
testing before you remove and inspect
the test strip or later when you are
reviewing the tests stored in your
meter's memory.
To select an event label, press the C
button while the blood glucose test
result is still showing on the meter
display. Each time you press the C
button, an event label from the list
will appear on the display.
Holding the C button down will
allow you to move more rapidly
through the list until the event
label you wish to select appears.
When you stop, the event label is
set. This event label will be stored
in memory with your test result.
It will appear on the meter display
with your test result, alternating with
the time and date.
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(Example)