When creating CO2 Emission report via WIZARD report, select appropriate columns in the left filter, such as: CO2 emission, Fuel used, Date, Registration and ADEP/ADES.
Once the report is created, click the filter icon and add EU ETS Exception filter selected as 'YES' - Leon will show only flights outside EU.
If you want a report for EU flights only, select an option 'NO' in the filter. You can also use a filter option Europe traffic filter where there are 5 options available:
By not selecting the filter Leon will show CO2 Emission report for all flights added to Leon.