[donalhunt]

This immediately reminded me of the "infinite" blackboards we had in some university lecture theatres such that you could just revolve the board surface and keep claiming new writing space (you could also write at a consistent level - no bending / stretching).

Something like this: https://www.ragandbonebristol.com/curiosities-1/vintage-wils...

[panglesd]

Very cool! I had never seen something like that!

Sometimes, I used the analogy of a big papyrus roll (like this one: https://pgi-shop.de/en/papyrus-roll-20-x-80-double/) to explain what is Slipshow. But your analogy is much better!

[philsnow]

I thought you were talking about the lecture theaters where there were 6-8 giant boards arranged on the wall with pulley systems so the lecturer can raise/lower them and access them independently, kind of like in [0]. Some of the setups are have enough writable area that it's not even really practical to fill them all up in a 2-hour lecture period. Using the available space in a smart way is definitely a learned skill; it's far too easy to start in the "wrong" place and end up needing to write "board via"s / "goto"s.

Do companies still do whiteboard interviews anymore for engineers? Whiteboard management in that context was also a learnable skill, though easier than managing multiple movable boards.

[0] https://www.quora.com/Why-do-awesome-schools-like-MIT-UCs-an...

[dtjohnnymonkey]

When I was in college they would use a transparency projector, but instead of transparency pages, there would be a roll with a crank that you would turn to advanced the roll. You would get the same effect as slipshow.

[DowagerDave]

...and if they went too fast the hand smudges and wrapping would make previous content indecipherable when they rolled it back :)