Selecting period for history analysis
History view allows to take a look at data measured in the past. You can specify exact period
of time that you are interested in. The selection should be done in three easy steps.1. Select suitable time unit
Use Period pulldown menu to select the most appropriate unit of time depending on total period you want to see. You can choose one of four values: day, week, month and year.
2. Set one time border
Use
or 
buttons to move in time until you see data either from beginning or end of the desired period from the history.3. Expand period as needed
Finally adjust numbers of period units that should also be taken into account. Either type the values manually or use up/down arrow buttons.
Example:
Let say we want to see data from the first quarter of year 2005. Firstly it is necessary to select month from the Period pulldown menu. Secondly we repeat clicking
button until we see January, 2005 in the period textfield. Now it only needs to enter number 2
into the 
field behind the
button so that also February and March are displayed.Hint: If you click the period textfield you will quickly get back to actual day/week/month or year.
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