You might be thinking of PhotoMesa, which was a research project (I think later commercialized) out of University of Maryland. Here is the research paper on Ph

You might be thinking of PhotoMesa, which was a research project (I think later commercialized) out of University of Maryland. Here is the research paper on PhotoMesa: http://www.cs.umd.edu/~bederson/images/pubs_pdfs/p19-khella.pdf http://www.cs.umd.edu/~bederson/images/pubs_pdfs/p19-khella.... And here's a YouTube video of PhotoMesa: https://youtu.be/CQYDhnBMoF0?si=SOWUcjSFyv47nfrt&t=59 https://youtu.be/CQYDhnBMoF0?si=SOWUcjSFyv47nfrt&t=59 Also, as a researcher who has studied and implemented Semantic Zooming, the original post (probably inadvertently) makes it sound like Underkoffler invented the idea. I'd have to double check things, but I believe it was Ben Bederson (also the creator of PhotoMesa above) and Jim Hollan that invented the concept of semantic zooming in their seminal work Pad++, which aimed to explore alternatives to basic GUI interfaces. Ben has a lot of papers looking at zooming interfaces for photos, presentations, calendars, and other visualizations. Here's the paper on Pad++ https://dl.acm.org/doi/pdf/10.1145/192426.192435 https://dl.acm.org/doi/pdf/10.1145/192426.192435