The Settings menu

Settings->Size

Sets the size of the game field (black box.) You may choose between 8 x 8, 10 x 10 and 12 x 12. The default is 8 x 8

Settings->Balls

Sets the number of balls in the black box. You may choose between 4 (the default), 6 or 8.

Settings->Tutorial

Switches the tutorial mode on or off. In tutorial mode, you can see where the balls actually are. Note that you have to start a new game for this change to take effect.

Settings->Configure Shortcuts...

Displays a standard KDE shortcut configuration dialog, in which you can change the keyboard shortcuts used by KBlackbox.