I have to re-style a website developed with a custom theme.
I want to change the layout, using a premium theme (Flex by Out of the sandbox).
The platform already has collections, which I want to modify because they are not well organized.
And it has about 30 products, which needs to be updated in the images (bad SEO at the moment).
The website is online.
Which is the best practice in order to substitute the theme?
Do I have to customise most of the Flex theme as dev partner in the development area (including products) and transfer it before changing the collections?
Or is better to make the customization in the testing area of the online store?
Thank you in advance.