Custom reports allow you to design your own Flow report(s) based on almost any Flow key and metric field.
To create a new Custom Report, click Add.
The Create Custom Report modal appears. Enter a Name, Type, Direction, and optionally provide a Report Description. When finished, click Next Step.
Select the desired Keys and Metrics flow fields. You can drag the headings to reorder them using the Preview section below. When you're ready, click Save.
The report will be listed under Custom Reports.
To run the custom report in View Reports, find it under Flow > Custom and add it to your table.
It will have the same familiar parameters as any other built-in Flow report. Click Execute to run the report.