Auto crossfade behaviour

does modifying auto-crossfade lenght in the properties windows affect the auto-crossfade already done on the timeline (i’m not talking about manual crossfade)?
if for example i want to change it from 2ms to 4ms, does all the already existing auto-crossfade change ?

I don’t know, but you could change it to 4 seconds and see, if it changes the old regions.