How to filter the measurement, e.g. using a BandPass filter?

Make sure the Time Data plot type is active by clicking at it. Then click (or F5) to open the active plot type settings. In the dialog box, make sure is checked and click the button to set the filtering settings.

Note that the filtering will be applied to the frequency domain plot-types if is checked in Plot->General Frequency Domain Settings....

Note also that the plot types Step response, Energy-time curve and Schroeder curve have similar settings for filtering. These filter settings are independent and will not affect the frequency response plot types.