Is it possible to add already existing parameters to a report that is being created through the report designer tool in dashboards? On that note, is there any type of user guide for this report desi...
Are you building in OneStream Studio? OneStream does offer a Level 2 Reporting Class:
If you have access here to Community - you likely also have access to Navigator their online self-paced training content. There is OneStream Studio overview content on Navigator that you may find helpful.
Lastly, a great way to learn how the Reports are constructed (Parameters, data sets, applying a Data Adapter table to populate the Report Component) - is to review and dissect an existing one that comes with one of their MarketPlace solutions. i.e. People Planning has a bunch of Studio Reports and you can review/study those to see how they were built.