By default, when displaying a dashboard all gadgets widgets will be loaded on the default time frame that was defined for each gadgetwidget.
In order to modify the time frame, click the 
icon and select the time frame to be applied on the dashboard. Several options are available:
Default = the default time frame that was configured for the dashboard
Last = last <selected_unit> from the actual execution time. For example last 1 day = from the current time until 1 day ago
Previous = previous <selected_unit> referring to the actual execution time. For example previous 1 day = yesterday midnight to midnight
Today = Displays shortcuts to different fixed units
Date Range = Customized specific time frame
Live = Near real time execution of the dashboard - all gadgets widgets will be cleared and will display current results, the gadgets widgets will be continuously updated while the dashboard is open
Custom Time = Custom Last/Previous values
All gadgets widgets will be reloaded according the selection. Click the icon again to modify or 'Default' to restore to default time.
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