This feature of IFs allows users to quickly display an annotation of different Run-Result-Files (.run file) and Scenario-Load-Files (.sce file) to understand exactly what parameters have been altered and how they were altered. When you see an Explain Scenario option, be sure to highlight the Run-Result-File or Scenario-Load-File that you would like to more clearly understand and click on Explain Scenario. The ensuing page (similar to the image below) will appear after a moment (because IFs is going online to retrieve the information you are looking for) that will show you specifically what interventions have been made in the Run-Result-File or Scenario-Load-File that you have chosen.