The Disk Usage is based on the code of Filelight. The Disk Usage shows you how your disk space is being used by a graphical representation of your file system. The following presentations are possible:
Filelight view: as a set of concentric segmented-rings
Choose → or Alt+Shift+S to start this feature in a separate window, or open it inside the Sidebar.
Disk Usage Keybindings, right click menu.
Shift+Arrow Up: Up one directory
Ctrl+N: new search
Ctrl+I: include all
Shift+Arrow Down: step into
Ctrl+L: Line view
Ctrl+D: Detailed view
Ctrl+F: Filelight view
Shift+Arrow Right: Next view
Shift+Arrow Left: Previous view