How can i dev in desktop only in webflow?

Hi i dont understand why when i selection desktop editing, why mobile change to ?

Here is my site Read-Only: LINK
(how to share your site Read-Only link)

Design changes cascade down from desktop unless overridden at smaller breakpoints. This is covered in the university.

So i cant just make modification for desktop only ? or Mobile only ?

And so what is this ?

There is a page in the Webflow University that I recommend you review if you haven’t.
It should help you resolve your issue.

If you are still stuck, let us know.

Thanks you that’s good appreciate !