The Settings Menu

Settings->Toolbars->Main Toolbar: Shows or hides the Main Toolbar.
Settings->Toolbars->Actions Toolbar: Shows or hides the Actions Toolbar.
Settings->Show Statusbar: Shows or hides the Statusbar.
Settings->Configure Shortcuts...: Displays a standard KDE shortcut configuration dialog to change the keyboard shortcuts for Ksudoku.
Settings->Configure Toolbars...: Displays a standard KDE dialog where you can configure the toolbar icons.
Settings->Configure Ksudoku...: Opens a dialog to configure Ksudoku. See Game Configuration section for details.