Captions on masonry grid in 7.1 to replicate what's available in 7.0

I have had a 7.0 site for 4 years and want to migrate to 7.1.  I started a trial on 7.1. It was going smoothly until I got to a page that has a gallery.  In 7.0 I use the image description as a caption with a link to an artist page.  When an individual image is clicked, it opens in a lightbox with the caption on the image.  I want to replicate this in 7.1 but I can't figure out how.  If I put a link in, a click goes to the linked page.  If I leave out the link, a click opens the lightbox but the caption doesn't appear as an overlay on the enlarge image.  Squarespace tells me I can’t do this.  Is there code that can make 7.1 work like 7.0 for the masonry gallery grid.  I don't want to invest a lot of time manually recreating my website in 7.1 if it doesn't have the basic features available to a gallery in 7.0. Thanks.