Dropdown feature

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Hi, I wan't to change my dropdown design for my store, but im unsure if its something related with what theme you have.

This is my store, when you click on "SHOP" it will take you to a new slide with all my collection. I want to change it something like this:

While here, if you click "SHOP" the collections dropdown instead of taking you to a new slide. This website does use a different them to me so i understand if i cant.

I am using dawn theme

This is my store domain: qmpryp-cx.myshopify.com

and this is my password: chasha