How to make a mobile version in tilde correctly?

Question

css

I had this problem before and I don't know how to fix it.
Well, in the tilde, I switch the screen to mobile to make the mobile version, but all the changes apply to desktop as well. And I also create a shape or text or something else, it throws me to the desktop one, why?

Answer 1

one.

Type in tilde

Already a mistake. You make up - this is when you open the same sublime with pens and write code.
And you only use a visual website builder.
2.

applied

apply 3
.

create

What is this new word?
4.
Open Tilda Helper and read. There are answers to all these questions.