The Settings menu

Settings->Show Statusbar

Toggle on or off the display of the statusbar. The default is on.

Settings->Show Grid

Toggle on and off the display of a grid on the playing field. The default is off.

Settings->Configure Shortcuts...

Configure the keyboard shortcuts used by KBattleship.

Settings->Configure Notifications...

Configure the audio and visual notifications used by KBattleship.

Settings->Play Sounds

Toggle whether sounds (played when shooting) should be played. The default is on.