In the screen Control times you can administrate the time-frames, which are used
for the statistics. You can select for example the time-frame "Before
Breakfast", if you want to analyze only this time-frame in the statistics.
The end time of one time-frame results from the starting time of the next
time-frame and can not be changed.
These
control times are only useful when you have a constant daily routine. For
SiDiary is a blood glucose value at 10:45 (see screenshot above) always an
"After Breakfast" value. If your daily routine is not that constant
and you want to filter values that are really measured after Breakfast, you
should select an event in addition. Then you can filter the event instead of
the control time.
References