The Report Period control is located at the top of the screen.
Use this control to quickly access the ability to filter your report by a date range.
To set a Report Period filter, firstly select the date attribute that you want to use:
Then either:
Select a dynamically moving date range via the 'Current Period', 'Last Period', and 'Last N Days' buttons
Select a specific date range by:
Clicking and dragging a range directly on the column chart OR
Typing in a From and To date in the date fields
The column chart is displaying with both blue and grey columns, what is going on?
This occurs when you have another type of filter applied. The blue columns represent the frequency of that period with all the filter applied and the grey columns represent the frequency if only the period filter is applied.