If this option is turned on, the from and to squares of the last piece to move are highlighted on the board, allowing you to easily identify the last move made. This option can be especially useful on tactic problems, where sometimes the previous opponent move can be important in deciding your response, either by giving some extra context to the problem - or more directly - if the move was a pawn move that allowed an en-passant capture.

When this option is enabled, the square a piece will drop on during drag and drop piece movement is highlighted. If the square of the drop location is a legal move, the square will be coloured green, otherwise it will be coloured red. This option is highly recommended if you are experiencing mouse slips, as it clearly shows where the piece will be dropped when you let go of the mouse which can be a source of confusion if the piece was dragged from off-centre.

This option turns off Drag and Drop piece movement, and you must rely only on click-and-click for piece movement. If you only use click-and-click it is recommended you turn this off as it saves some browser resources that would otherwise be used.

This disables Click-and-Click piece movement, the most common reason for wanting to disable this is to remove the square highlighting associated with this mode of movement, as even when drag and drop mode is used exclusively, the source square is still highlighted when the drag is initialized.