User can mouse-over any glossary term to see the contents of the web page re-formatted into this small size ‘card’ displayed vertically and horizontally centred on the page.
Here the term ‘H-LAM/T has ° after it which means it’s a glossary term:
Next, the user has mouse-overed ‘H-LAM/T’ and this dialog comes up. It goes away on click outside:
In the view above the user has clicked on ‘invented by – Doug Engelbart ‘ to open its term, below, replacing the contents of the card:
Doug Engelbart. Hegland, 2019.