To have accounts included in the report, they must be linked to an account group: ACG. This can be done by entering the report, highlight the line in the report and press enter. You are now directed to the account group (ACG) for this report line. In the middle on the left hand side you see the fields "Range" and " Selected accounts" where you can use the magnifying glass to select / deselect required accounts to be added to the report. When an account (ACC) is added to the account group (ACG) it will appear in the report.