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There were overhead projectors with transparency rolls, and they could provide an experience similar to scrolling on a computer screen. The content was usually
by unnah 4y ago
There were overhead projectors with transparency rolls, and they could provide an experience similar to scrolling on a computer screen. The content was usually hand-written with a marker on the transparency rolls, often during the presentation. This kind of overhead projector was popular in schools, but I'm not sure if anyone ever delivered a business presentation on a roll of transparency...
This is the best picture I could find on google: https://www.bhphotovideo.com/c/product/244154-REG/Apollo_VSTY_50_Styrene_Roll_for_OHP.html https://www.bhphotovideo.com/c/product/244154-REG/Apollo_VST...
- altcognito 4y agoAnd I think the reason these were popular was that it was a lot more convenient to scroll when you needed more writing space. It was more about working on the fly in front of students than creating scrollable presentations. At least that was my experience as a student at the time.
- kevin_thibedeau 4y agoIt was also a way to avoid handling chalk when whiteboards weren't a thing.