Show the second picture in the popup window

Hi,

I have bought the Personal version of this plugin today and it works fine with Gallery/Content-popup view.

However I am customizing it to fully fit my needs, there is one thing you should help me work out.

I have small pictures which I use as thumbnails for the portfolio page and large pictures which are shown in the popup for each project. When the popup window opens, I therefore want the second picture of the project to show up on the left, not the first one which is too small and becomes pixelated.

By working on CSS rules I have managed to hide the first thumbnail but how can I show the second image of the project instead of the first one?

Thanks for your assistance.

Paolo

https://www.ads-software.com/plugins/portfolio-gallery/