We disable the prettyPhoto script on mobile because the image may be too small for some screens.

If you want to enable it again you need to edit control.js  and at line 1485 remove this code

var mediaQuery = 'has_pretty_photo';
if (Modernizr.mq('only screen and (max-width: 600px)') || Modernizr.mq('only screen and (max-height: 520px)')) {
mediaQuery = 'no_pretty_photo';
//$("a[data-pretty^='prettyPhoto']").unbind('click');
$("a[rel^='prettyPhoto']").unbind('click');
}

// pretty photo on / off
mediaQuery = 'has_pretty_photo';

if ((Modernizr.mq('only screen and (max-width: 600px)') || Modernizr.mq('only screen and (max-height: 520px)')) && mediaQuery === 'has_pretty_photo') {
// jQuery("a[data-pretty='prettyPhoto']").unbind('click');
jQuery("a[rel^='prettyPhoto']").unbind('click');
mediaQuery = 'no_pretty_photo';
} else if (!Modernizr.mq('only screen and (max-width: 600px)') && !Modernizr.mq('only screen and (max-height: 520px)') && mediaQuery === 'no_pretty_photo') {
//$("a[data-pretty='prettyPhoto']").prettyPhoto();
$("a[rel^='prettyPhoto']").prettyPhoto();
mediaQuery = 'has_pretty_photo';
}