[Keyframe]

That's kind of the (almost) whole point of Scrivener.

Also, I've seen this recently: https://innovationdilation.com/ but there are many many more like that.

[paultopia]

This functionality is kind of huge for me though. I'm getting sick of Apple quality control problems, and have been thinking of bailing to a pixelbook with crostini. Scrivener is one of the few apps that makes me reluctant to pull the trigger; if lyx can replace it then...