Hello,
I would like to add an horizontal menu at the top of the collection products page that enables you to switch from one collection to another.
This is what I have:
This is what I want:
Could you please help me with this?
Thank you!
Sorry you are facing this issue, it would be my pleasure to help you.
Welcome to the Shopify community! 
Thanks for your good question.
Please share your site URL,
I will check out the issue and provide you a solution here.
Hello! Thanks for your reply.
My url is www.matiere-studio.com
and password: weareg
It would be great if you could help with this.
Thank you.