The Dolphin Handbook
Dolphin is the default file manager for , designed with usability as a primary focus.

Introduction
Dolphin is 's default file manager. It aims to improve usability at the user interface level. Dolphin focuses only on being a file manager whereas , which was 's default file manager in 3 and can still be used for file management, is a universal viewer for many file types.
This development approach allows for concentrating on optimizing the user interface for the specific task of file management.
Please report any problems or feature requests to the Dolphin author via the bug report dialog. This is accessible from the Help Report Bug... menu of the application.