Reply to SE Drum roll shorten skillz

I'm probably being a bit of numpty, but I cant find the info, Is there a way to make the loop shorten more incremental...

When I set a 4 beat loop from the SE, and then use the appropriate shorten loop button, when kept pressed the shortening seems very linear and shortens to the minimum loop size very quickly and in the process of doing so doesn't always sound in time or follow any kind of rhythm, similarly if shorten is pressed repeatedly it's also hard to keep the timing correct.

Is there a way to shorten in a more sequenced and beat syncronized way ie halving the amount of beats each time the shorten button is pressed or is it just down to serious practice hitting the shorten button in time to the beat?

any help much appreciated