Highcharts: legendItemClick: make background transparent instead of deleting it

Question

I know how I can prevent from deleting a slice from pie chart,

legendItemClick: function () {
    return false;
}

but how can I make slice to be transparent instead of deleting it from chart?

I just want to be like this:

Answer 1

Set ignoreHiddenPoints: false see: http://jsfiddle.net/NZ9d7/