Change hover image and icon

Hi there!

First of all, thank you for this awesome theme!

I would like to ask if there’s a way to change the image hover effect on the images of partner, logo element (the arrow icon) to display some text. I know you can add a caption that appears above the image but I would like it to display on top of the image (kind of like this one http://demo.udthemes.com/cartel/wordpress/

Is there any way to tweak the ajax hover effect?

Thanks!