This is half a feature request and half a bug report for unexpected behaviour, in that the current behaviour is by design but confuses everyone enough that they think it's broken.
The issue
The way you set typewriter speed is with a setting on the presenter. A presenter will then create a default typewriter with the requested speed, but if you now change the speed the way you set it initially (via the presenter) then the typewriter has no way of knowing and will remain unchanged.
You can change the speed of a typewriter at runtime, but it requires getting hold of the created typewriter object and changing its LettersPerSecond/WordsPerSecond directly.
The proposal
The default typewriters be set to listen for changes to the speed property on their parent presenter, and update their LettersPerSecond/WordsPerSecond accordingly.
A secondary proposal
The previous proposal allows applying a change to typewriter speed at runtime, but will only apply from the following line onwards.
Though it's more work, if the logic of the default typewriters were updated to use counting offsets instead of time offsets, changing speed in the middle of a line would be possible too. This would bring base Yarn Spinner in line with the TextAnimator integration that Yarn Spinner+ has, which allows changing typewriter speed mid-line with the use of [speed=n].
This is half a feature request and half a bug report for unexpected behaviour, in that the current behaviour is by design but confuses everyone enough that they think it's broken.
The issue
The way you set typewriter speed is with a setting on the presenter. A presenter will then create a default typewriter with the requested speed, but if you now change the speed the way you set it initially (via the presenter) then the typewriter has no way of knowing and will remain unchanged.
You can change the speed of a typewriter at runtime, but it requires getting hold of the created typewriter object and changing its LettersPerSecond/WordsPerSecond directly.
The proposal
The default typewriters be set to listen for changes to the speed property on their parent presenter, and update their LettersPerSecond/WordsPerSecond accordingly.
A secondary proposal
The previous proposal allows applying a change to typewriter speed at runtime, but will only apply from the following line onwards.
Though it's more work, if the logic of the default typewriters were updated to use counting offsets instead of time offsets, changing speed in the middle of a line would be possible too. This would bring base Yarn Spinner in line with the TextAnimator integration that Yarn Spinner+ has, which allows changing typewriter speed mid-line with the use of
[speed=n].