The history panel displays recent look ups in list form with a thumbnail of their QSL picture if available, the call sign of the reporting station, if you have worked this call in your log the information will display in green as well as giving the date and time worked.
Double clicking on the text portion of an entry will display that QSO and tune the radio to the QSO frequency.
Double clicking on the Flag or QSL Image portion of the entry will display the Flag or QSL Image full size in it's own window.