Understanding report development
Report development is completely different from what it used to be. The report development experience changed in Dynamics NAV 2009 with the introduction of the Report Definition Language Client-side (RDLC) report, but it changes again with the actual release of the application.
With Dynamics NAV 2009, RDLC-based reports were introduced, but reports were still compatible with the classic definition of reports in Dynamics NAV. RDLC reports were actually based on the classic definition of the report.
From Dynamics NAV 2013, the reports classic definition has disappeared and only RLDC-based reports are available. This is why the report development experience has changed again. It now resembles the development experience of pages, queries, or XMLPorts.