Hi! I’m no expert by any means but I add content by typing it into the code that goes into the text editor. Like this:
<img src=”https://ampedforeducation.org/wp-content/uploads/2014/10/jeff-staff-photo-1.jpg” alt=”Jeff” width=”300px” height=”300px” />
<div style=”display: none;”>
<div id=”lbp-inline-href-1″ style=”padding: 10px; background: #fff;”>
<p style=”display: inline-block; margin: 10px;”>After receiving an undergraduate degree in History and a graduate degree in Education from the University of Massachusetts Amherst, Jeff taught for six years in Massachusetts, Texas, and New Hampshire. During that time, he organized and led group ski trips to Vermont and Quebec City. Since graduating, Jeff read about the education gap in Nicaragua and founded Amped for Education to close it. In 2010, he called on his teaching and tourism experience to create and educational opportunity for his high school students, in what was the first of many voluntourism experiences created for Amped for Education volunteers. In his spare time, Jeff enjoys coaching baseball, hot sauce, straight shaves, and gallo pinto.</p>
And this is the result: https://ampedforeducation.org/lightbox-test/
There might be another way but I’m not sure what it is, and this way works pretty well!