Please go to ../goodstore/css/ and open file template.min.css and find size 455px and change it to your maximal height, e.g. 800px.

Then you will have to change this size in ../goodstore/functions.php on line 322.

You should see add_image_size(‘slider-size’, 488, 455, true); Change 455 to 0.

Just like this

add_image_size(‘slider-size’, 488, 0, true);

Then you will have to resize image thumbs. We recommend plugin called Simple Image Sizes. Resize thumbs and save it (you can find how to here – http://support.jawtemplates.com/goodstore/web/?p=195)

We strongly recommend make this customization into your child theme.

Thats all 🙂