(Subtitle Edit) Easy way to dynamically adjust sub duration?

[Asterra]

I know you can apply a universal min/max to subtitle duration. But given that some subtitles are a single word while others are multiple sentences, this feels less than useful. Running through the entire movie to manually figure out how many seconds and fractions of seconds a given sub should usefully stick around would take ten times as long as watching the movie in total.

That's why I suspect the software has some kind of dynamic setting. Like, two seconds minimum for a single word, up to eight seconds for two lines of text. That sort of thing. I suspect there's something like this, but I'm not finding it. Hoping I'm right.

If I'm wrong, then what do people recommend? Is there a way of making this a little less cumbersome than playing/pausing and typing in numbers for every single subtitle?

[Ennio]

In list view, select the lines you want to edit. Right-click --> "Adjust durations for selected lines".