I am facing an annoying problem
I currently have two newsletter pop ups showing on my website - one of them was enabled from a theme I used previously. The issue is, I cannot locate where to switch it off.
The old theme I used is Cascade by Switch.
Any advice would be greatly appreciated
It really depends on the theme, but go to Theme --> Customize and look through all options. Some theme developers placed them at very odd places, I've seen them place Enable/Disable button in the header/footer sections. Especially with the recent Shopify Theme editor, things look different.
Just look through every option in theme settings, it should be there.