Code for adding hover title & effect to gallery pages on Momentum?

Hello,

I am working on the Momentum template, which so far ticks all of my design/ layout boxes, except for the fact that I would like to have the 'hover effect' with titles on each of my images on the gallery pages (these appear in two formats on my site: summary block & grid galleries). Other templates have this 'hover/ title feature' as standard, including Avenue: https://www.squarespace.com/templates/avenue & Jasper https://www.squarespace.com/templates/jasperBut unfortunately they don't fit with a'll of my other requirements. It would be great to have the option to splice the two templates together to create my perfect template, but failing that, could anyone advise on how to add code to create this 'hover' function on my Momentum gallery pages?Huge thanks!Alex