Gallery Image Alt Tag and Caption

Site URL: https://theartsupplyco.squarespace.com/

Hello! My client is using a Gallery to highlight specific artwork and they want to use the Caption for each image in order to display the artist's name under that image on the page. They would also like to use a separate alt text for each image that is more concise for SEO and accessibility purposes. Is this possible through code?  Right now, the Caption also serves as alt text for gallery images.  Thanks!

It looks like Squarespace use Description for Alt, and no way to adjust this.

Or you will need to use Description box for Alt

Then use code manually to add another Description

(1 image = 1 code to add description. If you still want this, please provide access password, we can give code easier)