Adjust image zoom on the Showcase theme

[LoganO]

Hi guys, I'm using the Showcase theme and have a question about the 'Enable image zoom' feature on my product pages. 

You can toggle on and off the 'Enable image zoom' feature in the settings, however, when a product image is clicked and it zooms in, it displays images full screen which is way too big.

Does anyone know what code could be inserted to make the image zoom be a maximum of 900px or maybe 70% of the screen width?

Thanks in advance!

[AnneLuo]

Hi, @LoganO 

Please share the store URL so that I can assist you.

[LoganO]

Thank you. Heres a url to one of my product pages:

https://escapeartist.shop/collections/photography-prints/products/karate-kid

[CATCHERS]

I have same issue as well.  https://www.catchers.store/collections/bedroom/products/siera-dressing-table-white