RDL layout development is one of the two layout design options you have for Dynamics 365 Business Central. Report layout design with Visual Studio 2017 (plus the Microsoft RDLC Report Designer for Visual Studio extension) has a fully-fledged development experience compared to Report Builder. An example is the Document Outline window, which shows a hierarchical view of the controls in the layout and lets you jump from one control to another quickly.

Specifically targeted at RDL layout development, you may find quite exhaustive official documentation from SQL Server Reporting Services, official courseware, or third-party books. This section contains some very good development references if you would like to completely master the RDL layout for Dynamics 365 Business Central. Even if they mostly come from earlier versions of Dynamics NAV or SQL Server Reporting Services, they still contain great hints, and you should spare them a spot in your personal library.

Here are some RDL layout development references: