nate
        function removeClickFromStack(obj, x, y)
            position = obj.indexOf(x, y);
            
            if position == -1
                % The point doesn't exist, so can't remove it
                return
            end
            
            obj.stack(position, :) = [];
        end
        
        %% paint
        % Add a point to the CData and update the AlphaData accordingly
        %
        % *Paramters*
        %
        % |x|: x coordinate
        %
        % |y|: y coordinate
