Don here from Shopify. :)
To set your products to display one per row on the mobile version of the Debut Theme, you need to make one simple change in one file.
To go from this:
You would just need to:
Open the following file in your theme code editor - Sections > collection.liquid
On lines 16, 19 and 22 change
And you're all set!
Thanks Don, that worked perfectly! You're my hero.
For the sake of anyone else with the same issue. It only changed it for the homepage and not on a collection page, so I just did exactly the same thing on line 151, 153 and 155. It worked a charm.
Really appreciate you helping me out,
@BossKie , can you please accept the answer from Bob? It was a great answer and solved it for me today. This way, it'll be noted at the top that this one is solved so someone else looking for this answer will read it since it will look solved. I almost missed it tonight... besides, I'm sure Bob would appreciate the credit. Thanks!