Pages not visible in the designer

Hello everyone;

I’m looking in all the courses. And I always come up against problems exclusively related to the designer because the site (in terms of code) does not have any errors
“The site is presented with 7 different screens made of static pages, link pages and image pages through lightboxes” but the designer’s working screen remains frozen on a link page! The one that appears when switching to the preview as a result of the mouse hovers on page one.

I probably have to modify “HIDDEN” and “NONE” temporarily in order to be able to work (I will put them back in order afterwards)

Do any of you have any ideas?

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

Well that’s it girls!.

I found all the little crossed-out eyes that were hiding in the Layout Display.
It allows me to work, but I don’t understand their use for the code?

Thanks to all, good night.