Need advice about photo gallery

Hello,

My WP site is based on very shorte entries posted in main page.
Each one contains a photo I have uploaded to media library.
Browsing main page users have these entries (very short description text) displayed sorted by date. They can click on these images to get a larger sample.
I use Responsive Lightbox plugin that ‘allows users to view larger versions of images and galleries in a lightbox (overlay) effect optimized for mobile devices.’

They have to close the big photo to click on another entry image to enlarge it.

What I want is to allow users to have Next/Prev buttons on enlarged images so they can see next/prev entry image without having to close the big photo, scroll the page to the next entry and then click again to enlarge next/prev photo.

Thanks in advance