#1. First, you need to change the Header button URL to #popup
and make sure “Open Link in new tab” is disabled.

#2. Add a section in the Footer and design its layout, we will get this to become popup content
#3. Use this tool to find this Section ID. In my example, we will have
- [data-section-id=”65fc64444b00577e6193d377″]

#4. Use this code to the Custom CSS box
[data-section-id="65fc64444b00577e6193d377"] {
position: fixed;
top: 50%;
left: 50%;
transform: translate(-50%,-50%);
z-index: 999999;
width: 90%;
min-width: 300px;
max-width: 750px;
}
footer.sections {
z-index: 9999999 !important;
}
[data-section-id="65fc64444b00577e6193d377"] .section-border {
top: 0 !important;
}
span.close-popup {
position: fixed;
top: 10px;
left: 10px;
}
[data-section-id="65fc64444b00577e6193d377"] {
display: none;
}
.show-popup {
display: block !important;
}
span.close-popup {
background-color: #ebfc72;
color: #000;
width: 30px;
height: 30px;
display: flex;
align-items: center;
justify-content: center;
}

#5. Use this code to Code Injection – Footer
<script src="https://ajax.googleapis.com/ajax/libs/jquery/3.7.0/jquery.min.js"></script>
<script>
$(document).ready(function(){
$('[href="#popup"]').click(function(){
$('[data-section-id="65fc64444b00577e6193d377"]').toggleClass('show-popup');
});
$('span.close-popup').click(function(){
$('[data-section-id="65fc64444b00577e6193d377"]').removeClass('show-popup');
});
});
</script>

#6. The result when users click on the Contact Us Header button
