Using

Starting
Type kdf at a command prompt or select Disk Free from the System group in the K menu. The standard and command options are available, and can be listed by entering kdf --help at the command prompt.

The Main window
The main window displays the available file devices.
Normally, the following pieces of information are included:
Screen
Screen
an icon depicting the type of storage
device name
filesystem type
total size
mount point
free disk space
the percentage of space used as a number and as a graph.
In the picture above, three devices are shown: two ext2-formatted hard drive partitions, one mounted at the filesystem root (/) and one at /home, and a mounted .
Left clicking on the header of a particular column sorts the devices according to that variable. A second left click sorts in the opposite order.
Clicking on a row pops up a menu. If that device is not currently mounted, the Mount Device option is available. If the device is mounted, it can be unmounted by choosing Unmount Device. Selecting Open in File Manager opens a new window with a graphical view of the files on that device.

The menubar

The File Menu
File Update 	Immediately updates the display to reflect the current status
Q File Quit 	Closes

The Settings menu and dialog
Settings Configure KDiskFree 	Opens a configuration dialog.
Configure Screen
Configure Screen
This dialog has two tabbed windows, General Settings and Mount Commands
General Settings 	Click on the word visible or hidden to turn display of an data field on or off.
Change the update frequency by moving the slider. The value in the box on the left is the interval (in seconds) between updates of the display to reflect the current status.
The FileManager setting controls the command executed when the Open Filemanager pop-up menu item is selected.
There are also two checkboxes. One controls if a filemanager window will be automatically opened when a device is mounted. The other causes an alert window to pop up if a disk gets critically full.
Mount Commands 	Allows the user to specify the mount and unmount commands for a given device, as well as the icon used to represent it. More information on these commands can be found on the man page for mount (type man mount at the command prompt).

The Help menu