In the below link, it doesn't have instruction about how to apply image pop up.
https://sawtoothsoftware.com/resources/question-library/image-popup
What I have done is, placed the below code as one of the member in a list
<a href="[%GraphicsPath()%]Picture4.png">
<img class="magnific-popup" src="[%GraphicsPath()%]Picture4.png" alt="" border="0" width="250">
</a>and placed magnific folder under graphics folder. It popup the images but I can't see close (X) icons etc.
Please let me know what I need to update.