How to add a border to the page

Question:
How to add a border to a page in Wix ?

Product:
[Which editor or feature is your question most relevant to? e.g. Wix Editor, Wix Studio Editor.]

I am using Wix Editor, I didn’t use any template, I started from the scratch with totaly a blank template

What are you trying to achieve:
[Explain the details of what you are trying to achieve. The more details you provide, the easier it is to understand what you need.]

I would like to add border to my page.

What have you already tried:
[Share resources, forum topics, articles, or tutorials you’ve already used to try and answer your question.]

Additional information:
[Include any other pertinent details or information that might be helpful for people to know when trying to answer your question.]

As you can see following this topic : Wix Editor: Changing Your Page Design | Help Center | Wix.com

The option page design should appear
or
By right mouse click on the page and choose the Overlapping elements >> Page, you can click on design and you can change the border of the page.

I tried both ways but the option doesn’t appear, it appears on my old website but not in the current website.

Thank you everyone for your help.

Kind regards,

Looking for your help and expertise, anyone ? thanks by advance