How to get a thumbnail attribute using WordPress ?

Published Oct 12, 2017Last updated Oct 13, 2017
How to get a thumbnail attribute using WordPress ?

Hi
I'm new in this community, I'm looking for some direction... I know some php but I struggling with something I can't resolve in my own for days.

I created a WP gallery, where thumbnails showstitlephp.jpg

Until there all good but...

I'd like to add the description attribute under the title where the red arrow is pointing. My questions are the following:

Where or how can I locate this specific attribute and how can I place it under the title of my gallery thumbnail?

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