'extensions' => [
        'grid-lightbox' => [
        
            // Set to `false` if you want to disable this extension
            'enable' => true,
        ]
    ]

// simple lightbox
$grid->picture()->lightbox();
//gallery
$grid->picture()->gallery();
//zoom effect
$grid->picture()->lightbox(['zooming' => true]);
$grid->picture()->gallery(['zooming' => true]);
//width & height properties
$grid->picture()->lightbox(['width' => 50, 'height' => 50]);
$grid->picture()->gallery(['width' => 50, 'height' => 50]);
//img class properties
$grid->picture()->lightbox(['class' => 'rounded']);
$grid->picture()->gallery(['class' => ['circle', 'thumbnail']]);