[Grace Themes]

Hi Anton,

Please make a small changes in custom-functions.php file to solve your issue regarding photo gallery images.

To display large photo gallery image
Go to the Appearance -> Editor -> custom-functions.php

at line no. 517 find the below code

$imgSrc = wp_get_attachment_image_src( get_post_thumbnail_id(), array(270, 200));

and replace with this code

$imgSrc = wp_get_attachment_image_src( get_post_thumbnail_id(), ‘full’);

Regards
Grace Themes