Hi, you do this:

<?php
PieChart::create(array(
    ...
    "options"=>array(
            ...
            "legend"=>array(
                  "position"=> 'labeled',
                  "labeledValueText"=> 'both',              
            )
    )
));
?>

You may do:

LineChart::create(array(
    ...
    "clientEvents"=>array(
        "itemSelect"=>"function(){}"
    )
))

By default, Google Chart does not have pointer on item select but we do add it when "itemSelect" event is set.