Cant access my multi image field in my CMS

I tried reading through the multi image field stuff and Im super confused on how it works. I have a multi image field in my CMS with all my other content and when I try to go add them into my details page it isn’t available to add to a lightbox, which is what I want to do with the content along with a description of some sort. What am I missing This is one of the last two things I need to get done to finish my portfolio and its driving me NUTS

Here is my public share link:

Hi @starweaver Catherine,

Here is another video related to your multi-image lightbox dilemma:


Enjoy, yet again.