DevExpress Reporting provides End-User Documentation that describes how to use the Web Document Viewer and Report Designer's UI in details.
This documentation is available in the GitHub repository: https://github.com/DevExpress/dotnet-eud.
You can clone documentation sources and create your own documentation websites and help files for projects based on reporting controls. Refer to the repository's README file for more information: https://github.com/DevExpress/dotnet-eud/blob/master/README.md.
A sample pre-built website is available at https://devexpress.github.io/dotnet-eud.
The following sections relate to DevExpress web reporting controls: