Vanilla 2

Hello I have the prettyphoto plugin included in my theme. When I press a photo it opens in preview mode. I want to make the preview mode bigger and I can't manage to do that. I tried to change the following values and absolutely nothing changed:

allow_resize: true,
allow_expand: true,
default_width: 3000,
default_height: 3000,

https://imokasa.ro/properties/apartament-4-camere-calea-dumbravii/

Please help! The people from the theme support told me that they do not offer support for pretty photo.

Many thanks,
Alex