I hope to give a quick answer that help's you on what i believe is occurring:
The 'Information" text in the top right corner is actually a link to a project 'page' called information that sits in Lay Theme's primary menu:
However this project page cannot be accessed because a class called 'disabled' has been applied to the <a> link making it not clickable - 'pointer-events:none;'
Now hiding above the viewport and away from the user is a box called 'Contacto' containing the <p> paragraph information that displays the content:
Here we can see that this box sits '-1000px' out of sight.
The trick happens that when 'information' is clicked a class is added/ toggled on called "active "
This new class "active" come's with some new CSS that changes the 'top:-1000px; to 'top: 37px;
Now "contacto" is forced into view and along with a transition for a smooth effect:
This method requires knowledge of basic CSS and JS Added to "Lay Options - Custom CSS & JS"
Remember with JS that you must load it within a 'newpage event' to work with Lay Theme - also that the common '$' needs to be changed to 'jQuery'
I hope this helps you @calvez_calvez and good luck! its a really cool customisation.
have a wonderful day and thank you for using Lay Theme :)